this could work, if access transformers would work

buildSrc/build.gradle.kts

@@ -1,5 +1,5 @@
 import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
-import java.util.*
+import java.util.Properties
 
 plugins {
 	`kotlin-dsl`
@@ -20,20 +20,14 @@ repositories {
 
 idea.module.setDownloadSources(true)
 
-fun DependencyHandler.plugin(id: String, version: String) {
-	this.implementation(group = id, name = "$id.gradle.plugin", version = version)
-}
+fun DependencyHandler.plugin(id: String, version: String) =
+	implementation(group = id, name = "$id.gradle.plugin", version = version)
 
 tasks.compileKotlin {
 	compilerOptions.languageVersion.set(KotlinVersion.KOTLIN_2_0)
 	kotlinOptions.jvmTarget = "17"
 }
 
-java {
-	sourceCompatibility = JavaVersion.VERSION_17
-	targetCompatibility = JavaVersion.VERSION_17
-}
-
 val gradleProperties = Properties().apply {
 	load(rootDir.parentFile.resolve("gradle.properties").inputStream())
 }

buildSrc/src/main/kotlin/util.kt

@@ -9,8 +9,8 @@ val JAVA_HOME = System.getProperty("java.home") ?: error("JAVA_HOME not set")
 fun Jar.clearSourcePaths() {
 	AbstractCopyTask::class.java.getDeclaredField("mainSpec").let {
 		it.isAccessible = true
-		val thing = it.get(this) as DefaultCopySpec
-		thing.sourcePaths.clear()
+		val spec = it.get(this) as DefaultCopySpec
+		spec.sourcePaths.clear()
 		it.isAccessible = false
 	}
 }

forge/build.gradle.kts

@@ -6,6 +6,7 @@ unimined.minecraft {
 	minecraftForge {
 		loader("forge_version"())
 		mixinConfig("createunlimited.mixins.json")
+		accessTransformer(file("run/accesstransformer.cfg"))
 	}
 
 	mappings {

forge/run/accesstransformer.cfg

@@ -0,0 +1,44 @@
+public net.minecraft.client.Minecraft pausePartialTick
+public net.minecraft.client.gui.Font getFontSet(Lnet/minecraft/resources/ResourceLocation;)Lnet/minecraft/client/gui/font/FontSet;
+public net.minecraft.client.gui.screens.TitleScreen panorama
+public net.minecraft.client.multiplayer.ClientPacketListener serverChunkRadius
+protected net.minecraft.client.particle.Particle stoppedByCollision
+public net.minecraft.client.renderer.ItemInHandRenderer mainHandItem
+public net.minecraft.client.renderer.ItemInHandRenderer offHandItem
+public net.minecraft.client.renderer.entity.ItemRenderer textureManager
+
+public-f net.minecraft.network.protocol.game.ClientboundPlayerAbilitiesPacket flyingSpeed
+
+public net.minecraft.server.MinecraftServer storageSource
+public net.minecraft.server.network.ServerGamePacketListenerImpl aboveGroundTickCount
+public net.minecraft.server.network.ServerGamePacketListenerImpl aboveGroundVehicleTickCount
+
+public net.minecraft.world.entity.Entity removalReason
+protected net.minecraft.world.entity.Entity positionRider(Lnet/minecraft/world/entity/Entity;Lnet/minecraft/world/entity/Entity$MoveFunction;)V
+public net.minecraft.world.entity.LivingEntity jumping
+
+public-f net.minecraft.world.item.HoneycombItem WAXABLES
+public net.minecraft.world.item.alchemy.PotionBrewing POTION_MIXES
+public net.minecraft.world.item.alchemy.PotionBrewing CONTAINER_MIXES
+public net.minecraft.world.item.alchemy.PotionBrewing ALLOWED_CONTAINER
+public net.minecraft.world.item.crafting.Ingredient values
+public net.minecraft.world.item.crafting.RecipeManager recipes
+
+public net.minecraft.world.level.BaseSpawner spawnPotentials
+public net.minecraft.world.level.BaseSpawner nextSpawnData
+public net.minecraft.world.level.biome.BiomeManager biomeZoomSeed
+public net.minecraft.world.level.block.entity.BeaconBlockEntity beamSections
+public net.minecraft.world.level.chunk.HashMapPalette values
+public net.minecraft.world.level.chunk PaletteResize
+
+public net.minecraft.client.model.geom.ModelPart cubes
+public net.minecraft.client.model.geom.ModelPart children
+public net.minecraft.client.model.AgeableListModel scaleHead
+public net.minecraft.client.model.AgeableListModel babyYHeadOffset
+public net.minecraft.client.model.AgeableListModel babyZHeadOffset
+public net.minecraft.client.model.AgeableListModel babyHeadScale
+public net.minecraft.client.model.AgeableListModel babyBodyScale
+public net.minecraft.client.model.AgeableListModel bodyYOffset
+
+public net.minecraft.client.gui.components.CommandSuggestions suggestions
+public net.minecraft.client.gui.components.CommandSuggestions$SuggestionsList <init>(Lnet/minecraft/client/gui/components/CommandSuggestions;IIILjava/util/List;Z)V

src/main/java/dev/rdh/createunlimited/asm/mixin/glue/ContraptionMixin.java

@@ -0,0 +1,16 @@
+package dev.rdh.createunlimited.asm.mixin.glue;
+
+import com.llamalad7.mixinextras.injector.ModifyExpressionValue;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+
+import com.simibubi.create.content.contraptions.Contraption;
+
+@Mixin(Contraption.class)
+public abstract class ContraptionMixin {
+	@ModifyExpressionValue(method = "moveBlock", at = @At(value = "INVOKE", target = "Lcom/simibubi/create/content/contraptions/glue/SuperGlueEntity;isGlued(Lnet/minecraft/world/level/LevelAccessor;Lnet/minecraft/core/BlockPos;Lnet/minecraft/core/Direction;Ljava/util/Set;)Z"))
+	private boolean a(boolean original) {
+		return true;
+	}
+}

src/main/java/dev/rdh/createunlimited/asm/mixin/glue/SuperGlueSelectionHelperMixin.java

@@ -0,0 +1,49 @@
+package dev.rdh.createunlimited.asm.mixin.glue;
+
+
+import it.unimi.dsi.fastutil.objects.ObjectOpenHashSet;
+
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Overwrite;
+
+import com.simibubi.create.content.contraptions.glue.SuperGlueEntity;
+import com.simibubi.create.content.contraptions.glue.SuperGlueSelectionHelper;
+
+import net.minecraft.core.BlockPos;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.phys.AABB;
+
+import java.util.Set;
+
+@Mixin(SuperGlueSelectionHelper.class)
+public abstract class SuperGlueSelectionHelperMixin {
+	/**
+	 * @author rdh
+	 * @reason test
+	 */
+	@Overwrite
+	public static Set<BlockPos> searchGlueGroup(Level level, BlockPos startPos, BlockPos endPos, boolean includeOther) {
+		if(endPos == null || startPos == null) {
+			return null;
+		}
+
+		AABB bb = new AABB(startPos, endPos);
+		Set<BlockPos> blocks = new ObjectOpenHashSet<>();
+		for(double posx = bb.minX; posx <= bb.maxX; posx++) {
+			for(double posy = bb.minY; posy <= bb.maxY; posy++) {
+				for(double posz = bb.minZ; posz <= bb.maxZ; posz++) {
+					BlockPos pos = new BlockPos(posx, posy, posz);
+					Block block = level.getBlockState(pos).getBlock();
+
+					if(block != Blocks.AIR && block != Blocks.WATER) {
+						blocks.add(pos);
+					}
+				}
+			}
+		}
+
+		return blocks;
+	}
+}

src/main/resources/createunlimited.mixins.json

@@ -5,10 +5,19 @@
   "plugin": "dev.rdh.createunlimited.asm.CUMixinConfig",
   "compatibilityLevel": "JAVA_17",
   "mixins": [
-    "CopycatBlockMixin", "ExtendoGripItemMixin", "accessor.CValueAccessor", "glue.SuperGlueSelectionHelperMixin",
-    "glue.SuperGlueSelectionPacketMixin", "train.CarriageContraptionMixin", "train.CTrainsMixin",
-    "train.StationBlockEntityMixin", "train.TrackEdgeMixin", "train.TrackPlacementMixin",
-    "train.TrackTargetingBlockItemMixin", "train.TrainMixin"
+    "CopycatBlockMixin",
+    "ExtendoGripItemMixin",
+    "accessor.CValueAccessor",
+    "glue.SuperGlueSelectionHelperMixin",
+    "glue.SuperGlueSelectionPacketMixin",
+    "glue.ContraptionMixin",
+    "train.CarriageContraptionMixin",
+    "train.CTrainsMixin",
+    "train.StationBlockEntityMixin",
+    "train.TrackEdgeMixin",
+    "train.TrackPlacementMixin",
+    "train.TrackTargetingBlockItemMixin",
+    "train.TrainMixin"
   ],
   "client": [
     "glue.SuperGlueSectionHandlerMixin",