diff --git a/prototypes/cpu.lua b/prototypes/cpu.lua
index 5337a7d..d738553 100644
--- a/prototypes/cpu.lua
+++ b/prototypes/cpu.lua
@@ -21,14 +21,39 @@ data:extend({
     enabled = false,
     energy_required = 50,
     ingredients = {
-      silicon,
-      spreader,
-      {"gold-ingot", 1},
-      {"electronic-circuit", 10},
+      silicon, spreader, {"gold-ingot", 1}, {"electronic-circuit", 10},
       {type="fluid", name="sulfuric-acid", amount=50},
     },
     results = {{"cpu", 10}},
   },
 })
-util.replace_ingredient("cpu", "electronic-circuit", "pcb", 10, false, {"force", true})
+if mods["space-exploration"] then
+  local cpui = {}
+  if mods.Krastorio2 then
+    cpui = {{"se-holmium-cable", 2}, silicon, spreader, {"electronic-circuit", 20}, {"gold-ingot", 1},
+            {type="fluid", name="sulfuric-acid", amount=50}}
+  else
+    cpui = {{"se-holmium-cable", 1}, silicon, spreader, {"electronic-circuit", 20}, {"gold-ingot", 1},
+            {type="fluid", name="sulfuric-acid", amount=50}}
+  end
+  data:extend({
+    {
+      type = "recipe",
+      name = "cpu-holmium",
+      icons = {
+        { icon = "__base__/graphics/technology/advanced-electronics-2.png", icon_size = 256, },
+        { icon = "__space-exploration-graphics__/graphics/icons/holmium-solenoid.png", icon_size = 64, scale=.25, shift={-8, -8} },
+      },
+      category = "crafting-with-fluid",
+      order = "d[cpu]",
+      enabled = false,
+      energy_required = 50,
+      ingredients = cpui,
+      results = {{"cpu", 20}},
+    },
+  })
+end
+
+util.replace_ingredient("cpu", "electronic-circuit", "pcb", 10, false, {"force", true})
+util.replace_ingredient("cpu-holmium", "electronic-circuit", "pcb", 20, false, {"force", true})
 end
diff --git a/prototypes/mainboard.lua b/prototypes/mainboard.lua
index 1053e3c..115ba3c 100644
--- a/prototypes/mainboard.lua
+++ b/prototypes/mainboard.lua
@@ -2,6 +2,7 @@ local util = require("data-util");
 
 
 if not mods.bobelectronics then
+
   data:extend({
     {
       type = "item",
@@ -23,12 +24,50 @@ if not mods.bobelectronics then
       results = {{"mainboard", 10}},
     },
   })
+   
+  if mods["space-exploration"] then
+    if mods.Krastorio2 then
+      mbi = {{"se-holmium-cable", 4}, {"advanced-circuit", 10}, {"gold-ingot", 1}}
+      mbo = {{"mainboard", 20}}
+    else
+      mbi = {{"se-holmium-cable", 2}, {"advanced-circuit", 10}, {"gold-ingot", 1}}
+      mbo = {{"mainboard", 20}}
+    end
+  end
+
+  if mods["space-exploration"] then
+    local mbo = {}
+    if mods.Krastorio2 then
+      mbo = {{"se-holmium-cable", 2}, {"advanced-circuit", 20}, {"gold-ingot", 1}}
+    else
+      mbo = {{"se-holmium-cable", 1}, {"advanced-circuit", 20}, {"gold-ingot", 1}}
+    end
+    data:extend({
+      {
+        type = "recipe",
+        name = "mainboard-holmium",
+        icons = {
+          { icon = "__bzgold__/graphics/icons/mainboard.png", icon_size = 128 },
+          { icon = "__space-exploration-graphics__/graphics/icons/holmium-solenoid.png", icon_size = 64, scale=.25, shift={-8, -8} },
+        },
+        category = "crafting-with-fluid",
+        order = "d[mainboard]",
+        enabled = false,
+        energy_required = 5,
+        ingredients = mbo,
+        results = {{"mainboard", 20}},
+      },
+    })
+  end
+
+
   if util.me.platinum() then
     util.add_ingredient("mainboard", "temperature-sensor", 10, {"force", true})
   end
   if util.me.palladium() then
     util.add_ingredient("mainboard", "mlcc", 10, {"force", true})
   end
+
 else
   util.remove_ingredient("superior-circuit-board", "copper-plate")
   util.remove_ingredient("superior-circuit-board", "tin-plate")
diff --git a/prototypes/processing-unit-updates.lua b/prototypes/processing-unit-updates.lua
index f0ec8a3..f0b3bdb 100644
--- a/prototypes/processing-unit-updates.lua
+++ b/prototypes/processing-unit-updates.lua
@@ -8,3 +8,9 @@ util.remove_ingredient("processing-unit", "advanced-circuit")
 util.add_ingredient("processing-unit", "cpu", 1)
 util.set_recipe_time("processing-unit", 4)
 util.add_ingredient("processing-unit", "mainboard", 1)
+
+
+util.add_unlock("se-processing-unit-holmium", "cpu-holmium")
+util.add_unlock("se-processing-unit-holmium", "mainboard-holmium")
+util.remove_recipe_effect("se-processing-unit-holmium", "se-processing-unit-holmium")
+util.remove_raw("recipe", "se-processing-unit-holmium")