diff --git a/core/src/mindustry/content/ErekirTechTree.java b/core/src/mindustry/content/ErekirTechTree.java
index 840104a239..ee43190e96 100644
--- a/core/src/mindustry/content/ErekirTechTree.java
+++ b/core/src/mindustry/content/ErekirTechTree.java
@@ -277,16 +277,16 @@ public class ErekirTechTree{
 
                 });
 
-                node(tankReconstructor, Seq.with(new OnSector(two)), () -> {
+                node(tankReconstructor, Seq.with(new OnSector(three)), () -> {
                     node(UnitTypes.locus);
 
-                    node(shipReconstructor, Seq.with(new OnSector(four)), () -> {
+                    node(shipReconstructor, Seq.with(new OnSector(three)), () -> {
                         node(UnitTypes.avert);
 
                         node(mechReconstructor, () -> {
                             node(UnitTypes.latum);
 
-                            node(tankAssembler, Seq.with(new OnSector(four), new Research(constructor), new Research(atmosphericConcentrator)), () -> {
+                            node(tankAssembler, Seq.with(new OnSector(three), new Research(constructor), new Research(atmosphericConcentrator)), () -> {
                                 node(UnitTypes.vanquish, () -> {
                                     node(UnitTypes.conquer, Seq.with(tmpNever), () -> {
 
@@ -317,7 +317,7 @@ public class ErekirTechTree{
             //TODO more sectors
             node(onset, () -> {
                 node(two, Seq.with(new SectorComplete(onset), new Research(ductRouter), new Research(ductBridge)), () -> {
-                    node(three, Seq.with(new SectorComplete(two), new Research(reinforcedContainer), new Research(ductUnloader), new Research(ventCondenser), new Research(electrolyzer)), () -> {
+                    node(three, Seq.with(new SectorComplete(two), new Research(ventCondenser)), () -> {
                         node(four, Seq.with(new SectorComplete(three), new Research(oxidationChamber), new Research(chemicalCombustionChamber)), () -> {
                             //TODO research reqs?
                             node(five, Seq.with(new SectorComplete(four)), () -> {