diff --git a/computer/26/expand.lua b/computer/26/expand.lua
index 482bccd..18a33af 100644
--- a/computer/26/expand.lua
+++ b/computer/26/expand.lua
@@ -9,13 +9,14 @@ mirror = mirror or false
 
 local TILES = 13
 
-function save(layer)
+function save(layer, slice)
     fs.delete("progress.lua")
     repeat
         file = fs.open("progress.lua", "w")
     until file
     file.write("progress = " .. progress .. "\n")
     file.write("layer_start = " .. layer .. "\n")
+    file.write("slice_start = " .. slice .. "\n")
 	-- todo save pos separately, more frequently
 	file.close()
 end
@@ -46,64 +47,89 @@ end
 -- assumes position is on lamp, right in front of the slice to be mined
 -- nearest the wall
 function clear_tile_slice()
+	if layer_start == 5 then
+		-- avoid breaking the existing floor
+		for _ = 0, progress*8 do
+			goForward()
+		end
+	end
 	for layer = layer_start, 5 do
-		save(layer)
-		local y = 12 - layer * 3
-		local x = 8
 		local length = 8 * TILES + 8
 		if layer == 5 then
-			x = x - 2
 			length = length - 2
 		end
-		turnLeft = (layer % 2 == 0) ~= mirror
-		local z = progress*8 + 1 + (layer % 2) * 7
-		if y < 0 then
-			-- avoid breaking the existing floor
-			for _ = 0, progress*8 do
-				goForward()
-			end
-		end
-		if mirror then
-			goTo(vector.new(-x,y,z), "east", true)
-		else
-			goTo(vector.new(x,y,z), "west", true)
-		end
 
-		for strip = 1, 8 do
+		for slice = slice_start, 7 do
+			save(layer, slice)
+			local y = 12 - layer * 3
+			local x = 8
+			if layer == 5 then
+				x = x - 2
+			end
+			turnLeft = ((layer + slice) % 2 == 0) ~= mirror
+			local z = progress * 8 + 1-- + (layer % 2) * 7
+
+			if layer % 2 == 0 then
+				z = z + slice
+			else
+				z = z + 7 - slice
+			end
+
+			local face = mirror and "east" or "west"
+
+			if slice % 2 == 1 then
+				x = x - length
+				face = rightOf[rightOf[face]]
+			end
+
+			if mirror then
+				x = -x
+			end
+			print("going to", x,y,z,face)
+			goTo(vector.new(x,y,z), face, true)
+			-- print("arrived")
+			-- read()
+
 			for _ = 1, length do
 				mine3_step()
 			end
-			if strip == 8 then
+			if slice == 8 then
 				turtle.digUp()
 				turtle.digDown()
 			else
 				turn()
 				mine3_step()
 				turn()
-				turnLeft = not turnLeft;
+				-- turnLeft = not turnLeft;
 			end
 		end
+		slice_start = 0
 		goLeft()
 		goLeft()
 	end
+	progress = progress + 1
+	save(0, 0)
+end
+
+function refuel()
+	if turtle.getFuelLevel() < 19500 then
+		goTo(vector.new(0,0,0), "north")
+		while turtle.getFuelLevel() < 20000 do
+			turtle.suck()
+			turtle.refuel()
+		end
+		turtle.drop()
+		goHome()
+	end
 end
 
 goHome()
+refuel()
 clear_tile_slice()
-progress = progress + 1
-save(0)
 for i = 1, 16 do
 	turtle.select(i)
 	turtle.drop()
 end
 turtle.select(1)
 goHome()
-goLeft()
-goLeft()
-while turtle.getFuelLevel() < 20000 do
-	turtle.suck()
-	turtle.refuel()
-end
-turtle.drop()
-goLeft()
-goLeft()
+refuel()
diff --git a/computer/26/path.lua b/computer/26/path.lua
index 59c052c..a27c047 100644
--- a/computer/26/path.lua
+++ b/computer/26/path.lua
@@ -5,7 +5,7 @@ _G.pos = _G.pos or vector.new(0,0,0)
 
 local up = vector.new(0,1,0)
 
-local rightOf = {
+rightOf = {
 	south = "west",
 	west = "north",
 	north = "east",
diff --git a/computer/26/progress.lua b/computer/26/progress.lua
index 1245b51..cf8d80c 100644
--- a/computer/26/progress.lua
+++ b/computer/26/progress.lua
@@ -1,2 +1,3 @@
 progress = 2
-layer_start = 0
+layer_start = 2
+slice_start = 4