diff --git a/core/src/mindustry/content/Blocks.java b/core/src/mindustry/content/Blocks.java
index 5a35f31d1d..8ad0e4033c 100644
--- a/core/src/mindustry/content/Blocks.java
+++ b/core/src/mindustry/content/Blocks.java
@@ -2329,11 +2329,15 @@ public class Blocks implements ContentList{
         payloadSource = new PayloadSource("payload-source"){{
             requirements(Category.units, BuildVisibility.sandboxOnly, with());
             size = 5;
+            alwaysUnlocked = true;
+            group = BlockGroup.units;
         }};
 
         payloadVoid = new PayloadVoid("payload-void"){{
             requirements(Category.units, BuildVisibility.sandboxOnly, with());
             size = 5;
+            alwaysUnlocked = true;
+            group = BlockGroup.units;
         }};
 
         //TODO move
diff --git a/core/src/mindustry/entities/EntityCollisions.java b/core/src/mindustry/entities/EntityCollisions.java
index e6651a420f..a503241116 100644
--- a/core/src/mindustry/entities/EntityCollisions.java
+++ b/core/src/mindustry/entities/EntityCollisions.java
@@ -135,7 +135,7 @@ public class EntityCollisions{
 
     public static boolean waterSolid(int x, int y){
         Tile tile = world.tile(x, y);
-        return tile == null || (tile.solid() || !tile.floor().isLiquid);
+        return tile == null || tile.solid() || !tile.floor().isLiquid;
     }
 
     public static boolean solid(int x, int y){
diff --git a/core/src/mindustry/entities/comp/WaterMoveComp.java b/core/src/mindustry/entities/comp/WaterMoveComp.java
index 36364b2168..ce008279cf 100644
--- a/core/src/mindustry/entities/comp/WaterMoveComp.java
+++ b/core/src/mindustry/entities/comp/WaterMoveComp.java
@@ -27,13 +27,14 @@ abstract class WaterMoveComp implements Posc, Velc, Hitboxc, Flyingc, Unitc{
 
     @Override
     public void update(){
+        boolean flying = isFlying();
         for(int i = 0; i < 2; i++){
             Trail t = i == 0 ? tleft : tright;
             t.length = type.trailLength;
 
             int sign = i == 0 ? -1 : 1;
             float cx = Angles.trnsx(rotation - 90, type.trailX * sign, type.trailY) + x, cy = Angles.trnsy(rotation - 90, type.trailX * sign, type.trailY) + y;
-            t.update(cx, cy, world.floorWorld(cx, cy).isLiquid ? 1 : 0);
+            t.update(cx, cy, world.floorWorld(cx, cy).isLiquid && !flying ? 1 : 0);
         }
     }
 
@@ -71,6 +72,12 @@ abstract class WaterMoveComp implements Posc, Velc, Hitboxc, Flyingc, Unitc{
         return isFlying() ? null : EntityCollisions::waterSolid;
     }
 
+    @Replace
+    @Override
+    public boolean onSolid(){
+        return EntityCollisions.waterSolid(tileX(), tileY());
+    }
+
     @Replace
     public float floorSpeedMultiplier(){
         Floor on = isFlying() ? Blocks.air.asFloor() : floorOn();
diff --git a/core/src/mindustry/ui/dialogs/SettingsMenuDialog.java b/core/src/mindustry/ui/dialogs/SettingsMenuDialog.java
index 66ec8f64d7..0f8820bc2a 100644
--- a/core/src/mindustry/ui/dialogs/SettingsMenuDialog.java
+++ b/core/src/mindustry/ui/dialogs/SettingsMenuDialog.java
@@ -605,7 +605,7 @@ public class SettingsMenuDialog extends Dialog{
             rebuild();
         }
 
-        void rebuild(){
+        public void rebuild(){
             clearChildren();
 
             for(Setting setting : list){
@@ -626,7 +626,7 @@ public class SettingsMenuDialog extends Dialog{
             public String title;
             public @Nullable String description;
 
-            Setting(String name){
+            public Setting(String name){
                 this.name = name;
                 String winkey = "setting." + name + ".name.windows";
                 title = OS.isWindows && bundle.has(winkey) ? bundle.get(winkey) : bundle.get("setting." + name + ".name");
@@ -658,7 +658,7 @@ public class SettingsMenuDialog extends Dialog{
             boolean def;
             Boolc changed;
 
-            CheckSetting(String name, boolean def, Boolc changed){
+            public CheckSetting(String name, boolean def, Boolc changed){
                 super(name);
                 this.def = def;
                 this.changed = changed;
@@ -687,7 +687,7 @@ public class SettingsMenuDialog extends Dialog{
             int def, min, max, step;
             StringProcessor sp;
 
-            SliderSetting(String name, int def, int min, int max, int step, StringProcessor s){
+            public SliderSetting(String name, int def, int min, int max, int step, StringProcessor s){
                 super(name);
                 this.def = def;
                 this.min = min;
diff --git a/core/src/mindustry/ui/fragments/PlacementFragment.java b/core/src/mindustry/ui/fragments/PlacementFragment.java
index 04684a2b70..f63ed7b45b 100644
--- a/core/src/mindustry/ui/fragments/PlacementFragment.java
+++ b/core/src/mindustry/ui/fragments/PlacementFragment.java
@@ -443,7 +443,7 @@ public class PlacementFragment extends Fragment{
     }
 
     boolean unlocked(Block block){
-        return block.unlockedNow();
+        return block.unlockedNow() && block.placeablePlayer;
     }
 
     boolean hasInfoBox(){
diff --git a/core/src/mindustry/world/Block.java b/core/src/mindustry/world/Block.java
index 308f937dd8..8d30819602 100644
--- a/core/src/mindustry/world/Block.java
+++ b/core/src/mindustry/world/Block.java
@@ -101,6 +101,8 @@ public class Block extends UnlockableContent{
     public boolean requiresWater = false;
     /** whether this block can be placed on any liquids, anywhere */
     public boolean placeableLiquid = false;
+    /** whether this block can be placed directly by the player via PlacementFragment */
+    public boolean placeablePlayer = true;
     /** whether this floor can be placed on. */
     public boolean placeableOn = true;
     /** whether this block has insulating properties. */
diff --git a/core/src/mindustry/world/blocks/defense/turrets/Turret.java b/core/src/mindustry/world/blocks/defense/turrets/Turret.java
index 308746919e..5f26af42d8 100644
--- a/core/src/mindustry/world/blocks/defense/turrets/Turret.java
+++ b/core/src/mindustry/world/blocks/defense/turrets/Turret.java
@@ -16,6 +16,7 @@ import mindustry.core.*;
 import mindustry.entities.*;
 import mindustry.entities.Units.*;
 import mindustry.entities.bullet.*;
+import mindustry.game.*;
 import mindustry.game.EventType.*;
 import mindustry.gen.*;
 import mindustry.graphics.*;
@@ -64,6 +65,7 @@ public class Turret extends ReloadTurret{
     public boolean accurateDelay = false;
     public boolean targetAir = true;
     public boolean targetGround = true;
+    public boolean targetHealing = false;
 
     //charging
     public float chargeTime = -1f;
@@ -320,7 +322,11 @@ public class Turret extends ReloadTurret{
         }
 
         protected boolean validateTarget(){
-            return !Units.invalidateTarget(target, team, x, y) || isControlled() || logicControlled();
+            return !Units.invalidateTarget(target, canHeal() ? Team.derelict : team, x, y) || isControlled() || logicControlled();
+        }
+
+        protected boolean canHeal(){
+            return targetHealing && hasAmmo() && peekAmmo().collidesTeam && peekAmmo().healPercent > 0;
         }
 
         protected void findTarget(){
@@ -328,6 +334,10 @@ public class Turret extends ReloadTurret{
                 target = Units.bestEnemy(team, x, y, range, e -> !e.dead() && !e.isGrounded(), unitSort);
             }else{
                 target = Units.bestTarget(team, x, y, range, e -> !e.dead() && (e.isGrounded() || targetAir) && (!e.isGrounded() || targetGround), b -> true, unitSort);
+
+                if(target == null && canHeal()){
+                    target = Units.findAllyTile(team, x, y, range, b -> b.damaged() && b != this);
+                }
             }
         }
 
diff --git a/core/src/mindustry/world/blocks/storage/CoreBlock.java b/core/src/mindustry/world/blocks/storage/CoreBlock.java
index 0fab6fc94d..7f3e67e5ce 100644
--- a/core/src/mindustry/world/blocks/storage/CoreBlock.java
+++ b/core/src/mindustry/world/blocks/storage/CoreBlock.java
@@ -55,6 +55,7 @@ public class CoreBlock extends StorageBlock{
         envEnabled = Env.any;
         drawDisabled = false;
         replaceable = false;
+        rebuildable = false;
     }
 
     @Remote(called = Loc.server)
diff --git a/servers_v7.json b/servers_v7.json
index d563e943b9..217026029a 100644
--- a/servers_v7.json
+++ b/servers_v7.json
@@ -21,7 +21,7 @@
   },
   {
     "name": "[cyan]DarkDustry",
-    "address": ["darkdustry.ml", "darkdustry.ml:7000", "darkdustry.ml:8000"] 
+    "address": ["darkdustry.ml", "darkdustry.ml:3000", "darkdustry.ml:7000", "darkdustry.ml:8000"] 
   },
   {
     "name": "Chaotic Neutral",
@@ -37,7 +37,7 @@
   },
   {
     "name": "io",
-    "address": ["mindustry.io.community", "mindustry.io.community:1000", "mindustry.io.community:2000", "mindustry.io.community:3000"]
+    "address": ["mindustry.io.community", "mindustry.io.community:1000", "mindustry.io.community:2000", "mindustry.io.community:3000", "mindustry.io.community:4000", "mindustry.io.community:5000"]
   },
   {
     "name": "Korea",