diff --git a/core/src/mindustry/entities/Damage.java b/core/src/mindustry/entities/Damage.java
index 64c08f318c..f3f50d9107 100644
--- a/core/src/mindustry/entities/Damage.java
+++ b/core/src/mindustry/entities/Damage.java
@@ -131,7 +131,7 @@ public class Damage{
                 }
 
                 //try to heal the tile
-                if(collide && hitter.type.collides(hitter, tile)){
+                if(collide && hitter.type.testCollision(hitter, tile)){
                     hitter.type.hitTile(hitter, tile, tile.health, false);
                 }
             }
diff --git a/core/src/mindustry/entities/bullet/BulletType.java b/core/src/mindustry/entities/bullet/BulletType.java
index ddcab2e9d5..f0f682b8e0 100644
--- a/core/src/mindustry/entities/bullet/BulletType.java
+++ b/core/src/mindustry/entities/bullet/BulletType.java
@@ -157,7 +157,7 @@ public abstract class BulletType extends Content{
         return Math.max(speed * lifetime * (1f - drag), maxRange);
     }
 
-    public boolean collides(Bullet bullet, Building tile){
+    public boolean testCollision(Bullet bullet, Building tile){
         return healPercent <= 0.001f || tile.team != bullet.team || tile.healthf() < 1f;
     }
 
diff --git a/core/src/mindustry/entities/comp/BulletComp.java b/core/src/mindustry/entities/comp/BulletComp.java
index 318f66facd..6a8ab4783a 100644
--- a/core/src/mindustry/entities/comp/BulletComp.java
+++ b/core/src/mindustry/entities/comp/BulletComp.java
@@ -125,7 +125,7 @@ abstract class BulletComp implements Timedc, Damagec, Hitboxc, Teamc, Posc, Draw
                 Building tile = world.build(x, y);
                 if(tile == null || !isAdded()) return false;
 
-                if(tile.collide(self()) && type.collides(self(), tile) && !tile.dead() && (type.collidesTeam || tile.team != team) && !(type.pierceBuilding && collided.contains(tile.id))){
+                if(tile.collide(self()) && type.testCollision(self(), tile) && !tile.dead() && (type.collidesTeam || tile.team != team) && !(type.pierceBuilding && collided.contains(tile.id))){
                     boolean remove = false;
 
                     float health = tile.health;
diff --git a/core/src/mindustry/ui/fragments/PlacementFragment.java b/core/src/mindustry/ui/fragments/PlacementFragment.java
index 0ee6f0d614..7bb3e6be3c 100644
--- a/core/src/mindustry/ui/fragments/PlacementFragment.java
+++ b/core/src/mindustry/ui/fragments/PlacementFragment.java
@@ -145,7 +145,7 @@ public class PlacementFragment extends Fragment{
                             break;
                         }
                     }
-                }else if(blockSelectEnd || Time.timeSinceMillis(blockSelectSeqMillis) > 750){ //1st number of combo, select category
+                }else if(blockSelectEnd || Time.timeSinceMillis(blockSelectSeqMillis) > 400){ //1st number of combo, select category
                     //select only visible categories
                     if(!getUnlockedByCategory(Category.all[i]).isEmpty()){
                         currentCategory = Category.all[i];