diff --git a/docs/Modpacks/Changes/v1.2.1.md b/docs/Modpacks/Changes/v1.2.1.md
new file mode 100644
index 0000000..3831ff0
--- /dev/null
+++ b/docs/Modpacks/Changes/v1.2.1.md
@@ -0,0 +1,58 @@
+---
+title: "Version 1.2.1"
+---
+
+
+# Updating from `1.2.0` to `1.2.1`
+
+
+## Custom Coils
+
+The `coilMaterial` function now uses a supplier instead of taking a material directly.
+
+```js
+// Before:
+.coilMaterial(GTMaterials.get('infinity'))
+
+// After:
+.coilMaterial(() => GTMaterials.get('infinity'))
+```
+
+
+## Recipe Modifiers
+
+If any of your machines had a custom recipe modifier, its syntax has changed slightly.
+
+More than one recipe modifier can now be applied, making more complex chains of modifiers easier to declare.  
+In particular, multiblocks supporting parallel hatches now need to be declared differently:
+
+```js
+// Before:
+.recipeModifier(GTRecipeModifiers.PARALLEL_HATCH.apply(OverclockingLogic.PERFECT_OVERCLOCK, GTRecipeModifiers.ELECTRIC_OVERCLOCK))
+
+// After:
+.recipeModifiers(GTRecipeModifiers.PARALLEL_HATCH, GTRecipeModifiers.ELECTRIC_OVERCLOCK.apply(OverclockingLogic.PERFECT_OVERCLOCK))
+```
+
+
+## Bedrock Ores
+
+Bedrock ore veins are no longer automatically generated.  
+They are now entirely up to modpack developers to define, and offer more flexibility than the previous system.
+
+
+```js
+GTCEuServerEvents.oreVeins(event => {
+    event.add('kubejs:my_custom_bedrock_vein', vein => {
+        // ...
+    })
+    event.modify('kubejs:other_custom_vein', vein => {
+        // ...
+    })
+    event.remove('kubejs:other_custom_vein')
+})
+```
+
+The documentation for how to use the add and modify events will follow soon.
+For now, please reference the [`BedrockOreDefinition.Builder`](https://github.com/GregTechCEu/GregTech-Modern/blob/1.20.1/src/main/java/com/gregtechceu/gtceu/api/data/worldgen/bedrockore/BedrockOreDefinition.java#L117) class in our source code.
+
diff --git a/docs/Modpacks/Examples/Ore-Processing-Plant.md b/docs/Modpacks/Examples/Ore-Processing-Plant.md
index a5793ae..c5f941d 100644
--- a/docs/Modpacks/Examples/Ore-Processing-Plant.md
+++ b/docs/Modpacks/Examples/Ore-Processing-Plant.md
@@ -26,7 +26,7 @@ GTCEuStartupEvents.registry('gtceu:machine', event => {
     event.create('ore_processing_plant', 'multiblock')
         .rotationState(RotationState.NON_Y_AXIS)
         .recipeType('ore_processing_plant')
-        .recipeModifier(GTRecipeModifiers.PARALLEL_HATCH.apply(OverclockingLogic.PERFECT_OVERCLOCK, GTRecipeModifiers.ELECTRIC_OVERCLOCK))
+        .recipeModifiers(GTRecipeModifiers.PARALLEL_HATCH, GTRecipeModifiers.ELECTRIC_OVERCLOCK.apply(OverclockingLogic.PERFECT_OVERCLOCK))
         .appearanceBlock(GTBlocks.CASING_TUNGSTENSTEEL_ROBUST)
         .pattern(definition => FactoryBlockPattern.start()
             .aisle(' AAA ', ' FFF ', ' FFF ', '  F  ', '     ', '     ', '     ')
diff --git a/docs/Modpacks/Other-Topics/Custom-Coils.md b/docs/Modpacks/Other-Topics/Custom-Coils.md
index 6df2fcc..36308e4 100644
--- a/docs/Modpacks/Other-Topics/Custom-Coils.md
+++ b/docs/Modpacks/Other-Topics/Custom-Coils.md
@@ -12,7 +12,7 @@ StartupEvents.registry('block', event => {
         .level(0)
         .energyDiscount(1) // (1)
         .tier(10)
-        .coilMaterial(GTMaterials.get('infinity'))
+        .coilMaterial(() => GTMaterials.get('infinity'))
         .texture('kubejs:block/example_block')
         .hardness(5)
         .requiresTool(true)