diff --git a/core/src/mindustry/content/Blocks.java b/core/src/mindustry/content/Blocks.java
index 310f922792..228649624f 100644
--- a/core/src/mindustry/content/Blocks.java
+++ b/core/src/mindustry/content/Blocks.java
@@ -3623,7 +3623,7 @@ public class Blocks{
             size = 3;
             configurable = false;
             plans.add(new UnitPlan(UnitTypes.stell, 60f * 60f, with(Items.graphite, 20f, Items.silicon, 40f)));
-            researchCostMultiplier = 1f / 12f;
+            researchCostMultiplier = 1f / 20f;
             consumePower(2f);
         }};
 
diff --git a/core/src/mindustry/content/ErekirTechTree.java b/core/src/mindustry/content/ErekirTechTree.java
index ae257e904d..73c11adf3e 100644
--- a/core/src/mindustry/content/ErekirTechTree.java
+++ b/core/src/mindustry/content/ErekirTechTree.java
@@ -186,7 +186,7 @@ public class ErekirTechTree{
                 });
             });
 
-            node(breach, Seq.with(new Research(siliconArcFurnace)), () -> {
+            node(breach, Seq.with(new Research(siliconArcFurnace), new OnSector(two)), () -> {
                 node(berylliumWall, () -> {
                     node(berylliumWallLarge, () -> {