diff --git a/core/assets/maps/five.msav b/core/assets/maps/five.msav
new file mode 100644
index 0000000000..df46eccec4
Binary files /dev/null and b/core/assets/maps/five.msav differ
diff --git a/core/assets/maps/four.msav b/core/assets/maps/four.msav
index fa3cf8f5b5..16e3baf663 100644
Binary files a/core/assets/maps/four.msav and b/core/assets/maps/four.msav differ
diff --git a/core/assets/maps/seven.msav b/core/assets/maps/seven.msav
deleted file mode 100644
index cd7b5aea51..0000000000
Binary files a/core/assets/maps/seven.msav and /dev/null differ
diff --git a/core/src/mindustry/content/Blocks.java b/core/src/mindustry/content/Blocks.java
index f96543fee2..93703559b3 100644
--- a/core/src/mindustry/content/Blocks.java
+++ b/core/src/mindustry/content/Blocks.java
@@ -2040,6 +2040,7 @@ public class Blocks{
             liquidCapacity = 20f;
             liquidPressure = 1.03f;
             health = 250;
+            researchCostMultiplier = 6;
         }};
 
         //TODO is this necessary? junctions are not good design
@@ -2049,12 +2050,14 @@ public class Blocks{
             buildCostMultiplier = 3f;
             health = 260;
             ((Conduit)reinforcedConduit).junctionReplacement = this;
+            researchCostMultiplier = 6;
         }};
 
         reinforcedBridgeConduit = new DirectionLiquidBridge("reinforced-bridge-conduit"){{
             requirements(Category.liquid, with(Items.graphite, 6, Items.beryllium, 10));
             range = 4;
             hasPower = false;
+            researchCostMultiplier = 6;
 
             ((Conduit)reinforcedConduit).rotBridgeReplacement = this;
         }};
@@ -2064,6 +2067,7 @@ public class Blocks{
             liquidCapacity = 30f;
             newDrawing = true;
             liquidPadding = 3f/4f;
+            researchCostMultiplier = 6;
         }};
 
         //TODO is there a need for a container if unloaders can unload 3x3s?
@@ -2073,6 +2077,7 @@ public class Blocks{
             size = 2;
             newDrawing = true;
             liquidPadding = 6f/4f;
+            researchCostMultiplier = 4;
         }};
 
         reinforcedLiquidTank = new LiquidRouter("reinforced-liquid-tank"){{
diff --git a/core/src/mindustry/content/ErekirTechTree.java b/core/src/mindustry/content/ErekirTechTree.java
index 4a1f0d4c43..ecf770ee3e 100644
--- a/core/src/mindustry/content/ErekirTechTree.java
+++ b/core/src/mindustry/content/ErekirTechTree.java
@@ -62,7 +62,7 @@ public class ErekirTechTree{
                     //TODO should only be unlocked in unit sector
                     node(constructor, Seq.with(new Research(siliconArcFurnace), new OnSector(four)), () -> {
 
-                        node(payloadMassDriver, () -> {
+                        node(payloadMassDriver, Seq.with(new OnSector(five)), () -> {
                             //TODO further limitations
                             node(payloadLoader, () -> {
                                 node(payloadUnloader, () -> {
@@ -155,7 +155,7 @@ public class ErekirTechTree{
                                     });
 
                                     node(atmosphericConcentrator, Seq.with(new OnSector(four)), () -> {
-                                        node(cyanogenSynthesizer, () -> {
+                                        node(cyanogenSynthesizer, Seq.with(new OnSector(five)), () -> {
 
                                         });
                                     });
@@ -207,7 +207,7 @@ public class ErekirTechTree{
 
                     });
 
-                    node(disperse, () -> {
+                    node(disperse, Seq.with(new OnSector(five)), () -> {
 
                     });
                 });
@@ -231,7 +231,7 @@ public class ErekirTechTree{
                     });
                 });
 
-                node(shipAssembler, () -> {
+                node(shipAssembler, Seq.with(new OnSector(five)), () -> {
                     node(UnitTypes.quell, () -> {
                         node(UnitTypes.disrupt, Seq.with(tmpNever), () -> {
 
@@ -253,7 +253,10 @@ public class ErekirTechTree{
                 node(aware, Seq.with(new SectorComplete(onset), new Research(ductRouter)), () -> {
                     node(three, Seq.with(new SectorComplete(aware), 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?
+                            node(five, Seq.with(new SectorComplete(four)), () -> {
 
+                            });
                         });
                     });
                 });
diff --git a/core/src/mindustry/content/SectorPresets.java b/core/src/mindustry/content/SectorPresets.java
index d0483036ad..3fe0dba5fa 100644
--- a/core/src/mindustry/content/SectorPresets.java
+++ b/core/src/mindustry/content/SectorPresets.java
@@ -12,7 +12,7 @@ public class SectorPresets{
     impact0078, desolateRift, nuclearComplex, planetaryTerminal,
     coastline, navalFortress,
 
-    onset, aware, three, four
+    onset, aware, three, four, five
     ;
 
     public static void load(){
@@ -132,6 +132,10 @@ public class SectorPresets{
             difficulty = 6;
         }};
 
+        five = new SectorPreset("five", erekir, 12){{
+            difficulty = 7;
+        }};
+
         //endregion
     }
 }
diff --git a/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java b/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java
index cf65b029b3..1e1e2fd03d 100644
--- a/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java
+++ b/core/src/mindustry/maps/planet/ErekirPlanetGenerator.java
@@ -27,7 +27,7 @@ public class ErekirPlanetGenerator extends PlanetGenerator{
     public static float crystalScl = 0.9f, crystalMag = 0.3f;
     public static float airThresh = 0.13f, airScl = 14;
 
-    Block[] terrain = {Blocks.regolith, Blocks.regolith, Blocks.regolith, Blocks.regolith, Blocks.yellowStone, Blocks.rhyolite, Blocks.carbonStone};
+    Block[] terrain = {Blocks.regolith, Blocks.regolith, Blocks.regolith, Blocks.regolith, Blocks.yellowStone, Blocks.rhyolite, Blocks.rhyolite, Blocks.carbonStone};
 
     {
         baseSeed = 2;