diff --git a/build.gradle b/build.gradle
index 12e9a800fa..78b6afa092 100644
--- a/build.gradle
+++ b/build.gradle
@@ -132,11 +132,6 @@ repositories {
         }
     }
 
-    // Mirror of maven.createmod.net
-    if (System.getProperty("os.name").contains("Mac") && System.getenv("USER") == "ithundxr") {
-        maven { url = "https://maven.ithundxr.dev/mirror" }
-    }
-
     // todo - temp
     maven { url = "https://maven.ithundxr.dev/hidden" } // Flywheel 1.21 PR
 }
@@ -175,7 +170,9 @@ dependencies {
     implementation("dev.ftb.mods:ftb-library-neoforge:2101.1.3")
 
     implementation("maven.modrinth:journeymap:1.21.1-6.0.0-beta.32+neoforge")
-    implementation("info.journeymap:journeymap-api-neoforge:2.0.0-1.21.1-SNAPSHOT")
+    implementation("info.journeymap:journeymap-api-neoforge:2.0.0-1.21.1-SNAPSHOT") {
+        exclude(group: "curse.maven") // Pulls in a old version of journey map which is for forge
+    }
 }
 
 sourceSets.main {
diff --git a/src/main/java/com/simibubi/create/AllDataComponents.java b/src/main/java/com/simibubi/create/AllDataComponents.java
index 7da60ddd37..c5e9927c44 100644
--- a/src/main/java/com/simibubi/create/AllDataComponents.java
+++ b/src/main/java/com/simibubi/create/AllDataComponents.java
@@ -24,6 +24,7 @@ import com.simibubi.create.content.schematics.cannon.SchematicannonBlockEntity.S
 import com.simibubi.create.content.trains.track.BezierTrackPointLocation;
 import com.simibubi.create.content.trains.track.TrackPlacement.ConnectingFrom;
 
+import net.createmod.catnip.codecs.stream.CatnipStreamCodecBuilders;
 import net.createmod.catnip.codecs.stream.CatnipStreamCodecs;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.UUIDUtil;
@@ -137,7 +138,7 @@ public class AllDataComponents {
 
 	public static final DeferredHolder<DataComponentType<?>, DataComponentType<List<List<ClipboardEntry>>>> CLIPBOARD_PAGES = DATA_COMPONENTS.registerComponentType(
 			"clipboard_pages",
-			builder -> builder.persistent(ClipboardEntry.CODEC.listOf().listOf()).networkSynchronized(ClipboardEntry.STREAM_CODEC.apply(ByteBufCodecs.list()).apply(ByteBufCodecs.list()))
+			builder -> builder.persistent(ClipboardEntry.CODEC.listOf().listOf()).networkSynchronized(CatnipStreamCodecBuilders.list(CatnipStreamCodecBuilders.list(ClipboardEntry.STREAM_CODEC)))
 	);
 
 	public static final DeferredHolder<DataComponentType<?>, DataComponentType<Unit>> CLIPBOARD_READ_ONLY = DATA_COMPONENTS.registerComponentType(
diff --git a/src/main/java/com/simibubi/create/content/equipment/clipboard/ClipboardEntry.java b/src/main/java/com/simibubi/create/content/equipment/clipboard/ClipboardEntry.java
index ad9789c390..af8b2e318b 100644
--- a/src/main/java/com/simibubi/create/content/equipment/clipboard/ClipboardEntry.java
+++ b/src/main/java/com/simibubi/create/content/equipment/clipboard/ClipboardEntry.java
@@ -1,8 +1,10 @@
 package com.simibubi.create.content.equipment.clipboard;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
+import com.google.common.collect.ImmutableList;
 import com.mojang.serialization.Codec;
 import com.mojang.serialization.codecs.RecordCodecBuilder;
 import com.simibubi.create.AllDataComponents;
@@ -17,6 +19,8 @@ import net.minecraft.network.codec.ByteBufCodecs;
 import net.minecraft.network.codec.StreamCodec;
 import net.minecraft.world.item.ItemStack;
 
+import org.jetbrains.annotations.UnmodifiableView;
+
 public class ClipboardEntry {
 	public static final Codec<ClipboardEntry> CODEC = RecordCodecBuilder.create(i -> i.group(
 			Codec.BOOL.fieldOf("checked").forGetter(c -> c.checked),
@@ -63,7 +67,14 @@ public class ClipboardEntry {
 	}
 
 	public static List<List<ClipboardEntry>> readAll(ItemStack clipboardItem) {
-		return clipboardItem.getOrDefault(AllDataComponents.CLIPBOARD_PAGES, new ArrayList<>());
+		List<List<ClipboardEntry>> entries = new ArrayList<>();
+
+		// Both these lists are immutable, so we unfortunately need to re-create them to make them mutable
+		List<List<ClipboardEntry>> saved = clipboardItem.getOrDefault(AllDataComponents.CLIPBOARD_PAGES, Collections.emptyList());
+		for (List<ClipboardEntry> inner : saved)
+			entries.add(new ArrayList<>(inner));
+
+		return entries;
 	}
 
 	public static List<ClipboardEntry> getLastViewedEntries(ItemStack heldItem) {
diff --git a/src/main/java/com/simibubi/create/foundation/recipe/RuntimeDataGenerator.java b/src/main/java/com/simibubi/create/foundation/recipe/RuntimeDataGenerator.java
index b01e34c690..06444efc02 100644
--- a/src/main/java/com/simibubi/create/foundation/recipe/RuntimeDataGenerator.java
+++ b/src/main/java/com/simibubi/create/foundation/recipe/RuntimeDataGenerator.java
@@ -137,7 +137,7 @@ public class RuntimeDataGenerator {
 			ResourceLocation id = ResourceLocation.fromNamespaceAndPath(recipe.id.getNamespace(),
 				typeId.getPath() + "/" + recipe.id.getPath());
 
-			Optional<JsonElement> serialized = CatnipCodecUtils.encode(Recipe.CONDITIONAL_CODEC, JsonOps.COMPRESSED, Optional.of(new WithConditions<>(recipe)));
+			Optional<JsonElement> serialized = CatnipCodecUtils.encode(Recipe.CONDITIONAL_CODEC, JsonOps.INSTANCE, Optional.of(new WithConditions<>(recipe)));
 			serialized.ifPresent(r -> JSON_FILES.put(id.withPrefix("recipes/"), r));
 			return recipe;
 		}