Cleanup

core/src/mindustry/content/Blocks.java

@@ -1314,7 +1314,7 @@ public class Blocks implements ContentList{
         }};
 
         coreNucleus = new CoreBlock("core-nucleus"){{
-            requirements(Category.effect, with(Items.copper, 1000, Items.lead, 1000));
+            requirements(Category.effect, with(Items.copper, 8000, Items.lead, 8000, Items.silicon, 5000, Items.thorium, 4000));
 
             unitType = UnitTypes.gamma;
             health = 4000;

core/src/mindustry/world/blocks/logic/MemoryBlock.java

@@ -10,6 +10,7 @@ public class MemoryBlock extends Block{
     public MemoryBlock(String name){
         super(name);
         destructible = true;
+        solid = true;
     }
 
     public class MemoryBuild extends Building{