diff --git a/core/assets/bundles/bundle.properties b/core/assets/bundles/bundle.properties
index 1bc5333d6d..eebc3632d6 100644
--- a/core/assets/bundles/bundle.properties
+++ b/core/assets/bundles/bundle.properties
@@ -515,6 +515,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 
 content.item.name = Items
 content.liquid.name = Liquids
diff --git a/core/assets/bundles/bundle_cs.properties b/core/assets/bundles/bundle_cs.properties
index 7275d3dfc4..b7ae8df2f3 100644
--- a/core/assets/bundles/bundle_cs.properties
+++ b/core/assets/bundles/bundle_cs.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Předměty
 content.liquid.name = Tekutiny
 content.unit.name = jednotky
diff --git a/core/assets/bundles/bundle_de.properties b/core/assets/bundles/bundle_de.properties
index 52ebb55ef8..c842cb6ac2 100644
--- a/core/assets/bundles/bundle_de.properties
+++ b/core/assets/bundles/bundle_de.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Materialien
 content.liquid.name = Flüssigkeiten
 content.unit.name = Einheiten
diff --git a/core/assets/bundles/bundle_es.properties b/core/assets/bundles/bundle_es.properties
index 3e93c1bfda..05cca99013 100644
--- a/core/assets/bundles/bundle_es.properties
+++ b/core/assets/bundles/bundle_es.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Objetos
 content.liquid.name = Líquidos
 content.unit.name = Unidades
diff --git a/core/assets/bundles/bundle_fr.properties b/core/assets/bundles/bundle_fr.properties
index c088ee00b3..fcbaa97fbc 100644
--- a/core/assets/bundles/bundle_fr.properties
+++ b/core/assets/bundles/bundle_fr.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Objets
 content.liquid.name = Liquides
 content.unit.name = Unités
diff --git a/core/assets/bundles/bundle_fr_BE.properties b/core/assets/bundles/bundle_fr_BE.properties
index 6e81cb74b3..9024da1edc 100644
--- a/core/assets/bundles/bundle_fr_BE.properties
+++ b/core/assets/bundles/bundle_fr_BE.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Objets
 content.liquid.name = Liquides
 content.unit.name = Unités
diff --git a/core/assets/bundles/bundle_in_ID.properties b/core/assets/bundles/bundle_in_ID.properties
index e24a065b32..73dc5c0e0e 100644
--- a/core/assets/bundles/bundle_in_ID.properties
+++ b/core/assets/bundles/bundle_in_ID.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Items
 content.liquid.name = Liquids
 content.unit.name = Units
diff --git a/core/assets/bundles/bundle_it.properties b/core/assets/bundles/bundle_it.properties
index 44176a7194..fd8fd15239 100644
--- a/core/assets/bundles/bundle_it.properties
+++ b/core/assets/bundles/bundle_it.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Oggetti
 content.liquid.name = Liquidi
 content.unit.name = Units
diff --git a/core/assets/bundles/bundle_ja.properties b/core/assets/bundles/bundle_ja.properties
index 63b21d297d..83b98c50fc 100644
--- a/core/assets/bundles/bundle_ja.properties
+++ b/core/assets/bundles/bundle_ja.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = アイテム
 content.liquid.name = 液体
 content.unit.name = ユニット
diff --git a/core/assets/bundles/bundle_ko.properties b/core/assets/bundles/bundle_ko.properties
index 716fb6b962..6616717803 100644
--- a/core/assets/bundles/bundle_ko.properties
+++ b/core/assets/bundles/bundle_ko.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = 아이템
 content.liquid.name = 액체
 content.unit.name = 유닛
diff --git a/core/assets/bundles/bundle_nl.properties b/core/assets/bundles/bundle_nl.properties
index 0d6c07e8db..92503f89b9 100644
--- a/core/assets/bundles/bundle_nl.properties
+++ b/core/assets/bundles/bundle_nl.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Items
 content.liquid.name = Liquids
 content.unit.name = Units
diff --git a/core/assets/bundles/bundle_pl.properties b/core/assets/bundles/bundle_pl.properties
index e332d979aa..b6d78a23c3 100644
--- a/core/assets/bundles/bundle_pl.properties
+++ b/core/assets/bundles/bundle_pl.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Przedmioty
 content.liquid.name = Płyny
 content.unit.name = Jednostki
diff --git a/core/assets/bundles/bundle_pt_BR.properties b/core/assets/bundles/bundle_pt_BR.properties
index 399a0cda93..ff94b15d05 100644
--- a/core/assets/bundles/bundle_pt_BR.properties
+++ b/core/assets/bundles/bundle_pt_BR.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Itens
 content.liquid.name = Liquidos
 content.unit.name = Units
diff --git a/core/assets/bundles/bundle_ru.properties b/core/assets/bundles/bundle_ru.properties
index 4e765b757a..ae029fd786 100644
--- a/core/assets/bundles/bundle_ru.properties
+++ b/core/assets/bundles/bundle_ru.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Предметы
 content.liquid.name = Жидкости
 content.unit.name = Боевые единицы
diff --git a/core/assets/bundles/bundle_tk.properties b/core/assets/bundles/bundle_tk.properties
index 5c6437de01..ad5e837852 100644
--- a/core/assets/bundles/bundle_tk.properties
+++ b/core/assets/bundles/bundle_tk.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Esyalar
 content.liquid.name = Sivilar
 content.unit.name = Units
diff --git a/core/assets/bundles/bundle_tr.properties b/core/assets/bundles/bundle_tr.properties
index 5dd7bd41ff..0f9d5bbb1f 100644
--- a/core/assets/bundles/bundle_tr.properties
+++ b/core/assets/bundles/bundle_tr.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Items
 content.liquid.name = Liquids
 content.unit.name = Units
diff --git a/core/assets/bundles/bundle_uk_UA.properties b/core/assets/bundles/bundle_uk_UA.properties
index aba4909bc6..4b30542d65 100644
--- a/core/assets/bundles/bundle_uk_UA.properties
+++ b/core/assets/bundles/bundle_uk_UA.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = Предмети
 content.liquid.name = Рідини
 content.unit.name = Бойові одиниці
diff --git a/core/assets/bundles/bundle_zh_CN.properties b/core/assets/bundles/bundle_zh_CN.properties
index 0613fd089f..401680fb2a 100644
--- a/core/assets/bundles/bundle_zh_CN.properties
+++ b/core/assets/bundles/bundle_zh_CN.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = 物品
 content.liquid.name = 液体
 content.unit.name = 部队
diff --git a/core/assets/bundles/bundle_zh_TW.properties b/core/assets/bundles/bundle_zh_TW.properties
index 7780b53c09..a1e753c667 100644
--- a/core/assets/bundles/bundle_zh_TW.properties
+++ b/core/assets/bundles/bundle_zh_TW.properties
@@ -505,6 +505,8 @@ rules.unitdrops = Unit Drops
 rules.enemycorebuildradius = Enemy Core No-Build Radius:[LIGHT_GRAY] (tiles)
 rules.respawntime = Respawn Time:[LIGHT_GRAY] (sec)
 rules.wavespacing = Wave Spacing:[LIGHT_GRAY] (sec)
+rules.buildcostmultiplier = Build Cost Multiplier
+rules.buildspeedmultiplier = Build Speed Multiplier
 content.item.name = 物品
 content.liquid.name = 液體
 content.unit.name = 機組
diff --git a/core/src/io/anuke/mindustry/entities/traits/BuilderTrait.java b/core/src/io/anuke/mindustry/entities/traits/BuilderTrait.java
index 98096ecc3b..e4c436d084 100644
--- a/core/src/io/anuke/mindustry/entities/traits/BuilderTrait.java
+++ b/core/src/io/anuke/mindustry/entities/traits/BuilderTrait.java
@@ -234,9 +234,9 @@ public interface BuilderTrait extends Entity, TeamTrait{
         if(!Net.client()){
             //deconstructing is 2x as fast
             if(current.breaking){
-                entity.deconstruct(unit, core, 2f / entity.buildCost * Time.delta() * getBuildPower(tile));
+                entity.deconstruct(unit, core, 2f / entity.buildCost * Time.delta() * getBuildPower(tile) * state.rules.buildSpeedMultiplier);
             }else{
-                entity.construct(unit, core, 1f / entity.buildCost * Time.delta() * getBuildPower(tile));
+                entity.construct(unit, core, 1f / entity.buildCost * Time.delta() * getBuildPower(tile) * state.rules.buildSpeedMultiplier);
             }
 
             current.progress = entity.progress();
diff --git a/core/src/io/anuke/mindustry/game/RulePreset.java b/core/src/io/anuke/mindustry/game/RulePreset.java
index 2fb2fbe504..10bbcf00d0 100644
--- a/core/src/io/anuke/mindustry/game/RulePreset.java
+++ b/core/src/io/anuke/mindustry/game/RulePreset.java
@@ -25,6 +25,8 @@ public enum RulePreset{
         pvp = true;
         enemyCoreBuildRadius = 600f;
         respawnTime = 60 * 10;
+        buildCostMultiplier = 0.5f;
+        buildSpeedMultiplier = 2f;
     }});
 
     private final Supplier<Rules> rules;
diff --git a/core/src/io/anuke/mindustry/game/Rules.java b/core/src/io/anuke/mindustry/game/Rules.java
index cf31cce7e0..0338e51b88 100644
--- a/core/src/io/anuke/mindustry/game/Rules.java
+++ b/core/src/io/anuke/mindustry/game/Rules.java
@@ -19,6 +19,10 @@ public class Rules{
     public boolean pvp;
     /**Whether enemy units drop random items on death.*/
     public boolean unitDrops;
+    /**Multiplier for buildings for the player.*/
+    public float buildCostMultiplier = 1f;
+    /**Multiplier for building speed.*/
+    public float buildSpeedMultiplier = 1f;
     /**No-build zone around enemy core radius.*/
     public float enemyCoreBuildRadius = 400f;
     /**Player respawn time in ticks.*/
diff --git a/core/src/io/anuke/mindustry/ui/dialogs/CustomRulesDialog.java b/core/src/io/anuke/mindustry/ui/dialogs/CustomRulesDialog.java
index 2f1c10663b..2048f88b99 100644
--- a/core/src/io/anuke/mindustry/ui/dialogs/CustomRulesDialog.java
+++ b/core/src/io/anuke/mindustry/ui/dialogs/CustomRulesDialog.java
@@ -15,6 +15,10 @@ public class CustomRulesDialog extends FloatingDialog{
 
     public CustomRulesDialog(){
         super("$mode.custom");
+
+        rules.waves = true;
+        rules.waveTimer = true;
+
         setFillParent(true);
         shown(this::setup);
         addCloseButton();
@@ -31,12 +35,14 @@ public class CustomRulesDialog extends FloatingDialog{
         main.row();
         main.addCheck("$rules.wavetimer", b -> rules.waveTimer = b).checked(b -> rules.waveTimer);
         main.row();
-        main.addCheck("$rules.waves", b -> rules.waves = b).checked(b -> rules.waves);
+        main.addCheck("$rules.waves", b -> rules.waves = b).checked(b -> rules.waves).disabled(b -> rules.pvp);
         main.row();
-        main.addCheck("$rules.pvp", b -> rules.pvp = b).checked(b -> rules.pvp);
+        main.addCheck("$rules.pvp", b -> rules.pvp = b).checked(b -> rules.pvp).disabled(b -> rules.waves);
         main.row();
         main.addCheck("$rules.unitdrops", b -> rules.unitDrops = b).checked(b -> rules.unitDrops);
         main.row();
+        number("$rules.buildcostmultiplier", f -> rules.buildCostMultiplier = f, () -> rules.buildCostMultiplier);
+        number("$rules.buildspeedmultiplier", f -> rules.buildSpeedMultiplier = f, () -> rules.buildSpeedMultiplier);
         number("$rules.enemycorebuildradius", f -> rules.enemyCoreBuildRadius = f*tilesize, () -> Math.min(rules.enemyCoreBuildRadius/tilesize, 200));
         number("$rules.respawntime", f -> rules.respawnTime = f*60f, () -> rules.respawnTime/60f);
         number("$rules.wavespacing", f -> rules.waveSpacing = f*60f, () -> rules.waveSpacing/60f);
@@ -46,7 +52,7 @@ public class CustomRulesDialog extends FloatingDialog{
         main.table(t -> {
             t.left();
             t.add(text).left().padRight(5);
-            Platform.instance.addDialog(t.addField((int)prov.get() + "", s -> cons.accept(Strings.parseFloat(s)))
+            Platform.instance.addDialog(t.addField(prov.get() + "", s -> cons.accept(Strings.parseFloat(s)))
             .valid(Strings::canParsePositiveFloat).width(120f).left().get());
         });
 
diff --git a/core/src/io/anuke/mindustry/ui/fragments/PlacementFragment.java b/core/src/io/anuke/mindustry/ui/fragments/PlacementFragment.java
index a627a248b1..116d9435d0 100644
--- a/core/src/io/anuke/mindustry/ui/fragments/PlacementFragment.java
+++ b/core/src/io/anuke/mindustry/ui/fragments/PlacementFragment.java
@@ -215,9 +215,10 @@ public class PlacementFragment extends Fragment{
                                             if(core == null || state.rules.infiniteResources) return "*/*";
 
                                             int amount = core.items.get(stack.item);
-                                            String color = (amount < stack.amount / 2f ? "[red]" : amount < stack.amount ? "[accent]" : "[white]");
+                                            int stackamount = Math.round(stack.amount * state.rules.buildCostMultiplier);
+                                            String color = (amount < stackamount / 2f ? "[red]" : amount < stackamount ? "[accent]" : "[white]");
 
-                                            return color + ui.formatAmount(amount) + "[white]/" + stack.amount;
+                                            return color + ui.formatAmount(amount) + "[white]/" + stackamount;
                                         }).padLeft(5);
                                     }).left();
                                     req.row();
diff --git a/core/src/io/anuke/mindustry/world/blocks/BuildBlock.java b/core/src/io/anuke/mindustry/world/blocks/BuildBlock.java
index 897ae23a44..b4de5b5c2d 100644
--- a/core/src/io/anuke/mindustry/world/blocks/BuildBlock.java
+++ b/core/src/io/anuke/mindustry/world/blocks/BuildBlock.java
@@ -197,8 +197,9 @@ public class BuildBlock extends Block{
             float maxProgress = checkRequired(core.items, amount, false);
 
             for(int i = 0; i < block.buildRequirements.length; i++){
-                accumulator[i] += Math.min(block.buildRequirements[i].amount * maxProgress, block.buildRequirements[i].amount - totalAccumulator[i] + 0.00001f); //add min amount progressed to the accumulator
-                totalAccumulator[i] = Math.min(totalAccumulator[i] + block.buildRequirements[i].amount * maxProgress, block.buildRequirements[i].amount);
+                int reqamount = Math.round(state.rules.buildCostMultiplier * block.buildRequirements[i].amount);
+                accumulator[i] += Math.min(reqamount * maxProgress, reqamount - totalAccumulator[i] + 0.00001f); //add min amount progressed to the accumulator
+                totalAccumulator[i] = Math.min(totalAccumulator[i] + reqamount * maxProgress, reqamount);
             }
 
             maxProgress = checkRequired(core.items, maxProgress, true);
@@ -215,6 +216,7 @@ public class BuildBlock extends Block{
         }
 
         public void deconstruct(Unit builder, TileEntity core, float amount){
+            float deconstructMultiplier = 0.5f;
 
             if(block != null){
                 ItemStack[] requirements = block.buildRequirements;
@@ -223,8 +225,9 @@ public class BuildBlock extends Block{
                 }
 
                 for(int i = 0; i < requirements.length; i++){
-                    accumulator[i] += Math.min(requirements[i].amount * amount / 2f, requirements[i].amount / 2f - totalAccumulator[i]); //add scaled amount progressed to the accumulator
-                    totalAccumulator[i] = Math.min(totalAccumulator[i] + requirements[i].amount * amount / 2f, requirements[i].amount);
+                    int reqamount = Math.round(state.rules.buildCostMultiplier * requirements[i].amount);
+                    accumulator[i] += Math.min(amount * deconstructMultiplier * reqamount, deconstructMultiplier * reqamount - totalAccumulator[i]); //add scaled amount progressed to the accumulator
+                    totalAccumulator[i] = Math.min(totalAccumulator[i] + reqamount * amount * deconstructMultiplier, reqamount);
 
                     int accumulated = (int)(accumulator[i]); //get amount
 
@@ -248,9 +251,10 @@ public class BuildBlock extends Block{
             float maxProgress = amount;
 
             for(int i = 0; i < block.buildRequirements.length; i++){
+                int sclamount = Math.round(state.rules.buildCostMultiplier * block.buildRequirements[i].amount);
                 int required = (int) (accumulator[i]); //calculate items that are required now
 
-                if(inventory.get(block.buildRequirements[i].item) == 0){
+                if(inventory.get(block.buildRequirements[i].item) == 0 && sclamount != 0){
                     maxProgress = 0f;
                 }else if(required > 0){ //if this amount is positive...
                     //calculate how many items it can actually use