diff --git a/core/src/mindustry/content/Blocks.java b/core/src/mindustry/content/Blocks.java
index 443132a8a6..414745f3dd 100644
--- a/core/src/mindustry/content/Blocks.java
+++ b/core/src/mindustry/content/Blocks.java
@@ -2295,7 +2295,7 @@ public class Blocks{
             hasLiquids = true;
             outputLiquid = new LiquidStack(Liquids.water, 5f / 60f / 9f);
             liquidCapacity = 20f;
-            researchCostMultiplier = 1f / 40f;
+            researchCostMultiplier = 1f / 50f;
         }};
 
         //TODO rename
@@ -2492,7 +2492,7 @@ public class Blocks{
             size = 2;
             attribute = Attribute.sand;
             output = Items.sand;
-            researchCostMultiplier = 1f / 8f;
+            researchCostMultiplier = 1f / 10f;
         }};
 
         plasmaBore = new BeamDrill("plasma-bore"){{
@@ -2502,7 +2502,7 @@ public class Blocks{
             tier = 3;
             size = 2;
             range = 4;
-            researchCostMultiplier = 1f / 30f;
+            researchCostMultiplier = 1f / 40f;
 
             consumeLiquid(Liquids.hydrogen, 0.25f / 60f).boost();
         }};
diff --git a/core/src/mindustry/content/ErekirTechTree.java b/core/src/mindustry/content/ErekirTechTree.java
index 21623f704e..eb4136dc1c 100644
--- a/core/src/mindustry/content/ErekirTechTree.java
+++ b/core/src/mindustry/content/ErekirTechTree.java
@@ -32,7 +32,7 @@ public class ErekirTechTree{
             //context().researchCostMultipliers = costMultipliers;
 
             node(duct, erekirSector, () -> {
-                node(ductRouter, () -> {
+                node(ductRouter, Seq.with(new SectorComplete(onset)), () -> {
                     node(ductBridge, () -> {
                         node(surgeConveyor, () -> {
                             node(surgeRouter);
@@ -61,7 +61,6 @@ public class ErekirTechTree{
                 node(reinforcedPayloadConveyor, Seq.with(new OnSector(four)), () -> {
                     //TODO should only be unlocked in unit sector
                     node(constructor, Seq.with(new Research(siliconArcFurnace), new OnSector(four)), () -> {
-
                         node(payloadMassDriver, Seq.with(new OnSector(five)), () -> {
                             //TODO further limitations
                             node(payloadLoader, () -> {
@@ -257,7 +256,7 @@ public class ErekirTechTree{
 
             //TODO more sectors
             node(onset, () -> {
-                node(two, Seq.with(new SectorComplete(onset), new Research(ductRouter)), () -> {
+                node(two, Seq.with(new SectorComplete(onset)), () -> {
                     node(three, Seq.with(new SectorComplete(two), new Research(reinforcedContainer), new Research(ductUnloader), new Research(ventCondenser)), () -> {
                         node(four, Seq.with(new SectorComplete(three), new Research(electrolyzer), new Research(oxidationChamber), new Research(chemicalCombustionChamber)), () -> {
                             //TODO research reqs?