diff --git a/src/main/java/com/jaquadro/minecraft/storagedrawers/config/CommonConfig.java b/src/main/java/com/jaquadro/minecraft/storagedrawers/config/CommonConfig.java
index 0c3d333e2..2e8893a27 100644
--- a/src/main/java/com/jaquadro/minecraft/storagedrawers/config/CommonConfig.java
+++ b/src/main/java/com/jaquadro/minecraft/storagedrawers/config/CommonConfig.java
@@ -2,6 +2,10 @@
 
 import net.minecraftforge.common.ForgeConfigSpec;
 
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Predicate;
+
 public final class CommonConfig
 {
     private static final ForgeConfigSpec.Builder BUILDER = new ForgeConfigSpec.Builder();
@@ -11,7 +15,11 @@ public final class CommonConfig
     public static final ForgeConfigSpec spec = BUILDER.build();
 
     private static boolean loaded = false;
+    private static List<Runnable> loadActions = new ArrayList<>();
+
     public static void setLoaded() {
+        if (!loaded)
+            loadActions.forEach(Runnable::run);
         loaded = true;
     }
 
@@ -19,6 +27,13 @@ public static boolean isLoaded() {
         return loaded;
     }
 
+    public static void onLoad(Runnable action) {
+        if (loaded)
+            action.run();
+        else
+            loadActions.add(action);
+    }
+
     public static class General {
         public final ForgeConfigSpec.ConfigValue<Integer> baseStackStorage;
         public final ForgeConfigSpec.ConfigValue<Boolean> enableUI;
@@ -28,9 +43,12 @@ public static class General {
         public final ForgeConfigSpec.ConfigValue<Boolean> debugTrace;
         public final ForgeConfigSpec.ConfigValue<Boolean> enableExtraCompactingRules;
         public final ForgeConfigSpec.ConfigValue<Integer> controllerRange;
+        public final ForgeConfigSpec.ConfigValue<List<? extends String>> compRules;
 
         public General(ForgeConfigSpec.Builder builder) {
             builder.push("General");
+            List<String> test = new ArrayList<>();
+            test.add("minecraft:clay, minecraft:clay_ball, 4");
 
             baseStackStorage = builder
                 .comment("The number of item stacks held in a basic unit of storage.",
@@ -51,10 +69,20 @@ public General(ForgeConfigSpec.Builder builder) {
                 .define("enableExtraCompactingRules", true);
             debugTrace = builder
                 .define("debugTrace", false);
+            compRules = builder
+                .comment("List of rules in format \"domain:item1, domain:item2, n\".",
+                    "Causes a compacting drawer convert n of item1 into 1 of item2.")
+                .defineList("compactingRules", test, obj -> CompTierRegistry.validateRuleSyntax((String)obj));
 
             builder.pop();
         }
 
+        /*cache.compRules = config.getStringList("compactingRules", sectionRegistries.getQualifiedName(), new String[] { "minecraft:clay, minecraft:clay_ball, 4" }, "Items should be in form domain:item or domain:item:meta.", null, LANG_PREFIX + "registries.compRules");
+        if (StorageDrawers.compRegistry != null) {
+            for (String rule : cache.compRules)
+                StorageDrawers.compRegistry.register(rule);
+        }*/
+
         public int getBaseStackStorage() {
             if (!isLoaded())
                 return 1;
@@ -84,7 +112,7 @@ public static class Upgrades {
         public final ForgeConfigSpec.ConfigValue<Integer> level5Mult;
 
         public Upgrades (ForgeConfigSpec.Builder builder) {
-            builder.push("Storage Upgrades");
+            builder.push("StorageUpgrades");
             builder.comment("Storage upgrades multiply storage capacity by the given amount.",
                 "When multiple storage upgrades are used together, their multipliers are added before being applied.");
 
diff --git a/src/main/java/com/jaquadro/minecraft/storagedrawers/config/CompTierRegistry.java b/src/main/java/com/jaquadro/minecraft/storagedrawers/config/CompTierRegistry.java
index 3cd93f590..068aa84e9 100644
--- a/src/main/java/com/jaquadro/minecraft/storagedrawers/config/CompTierRegistry.java
+++ b/src/main/java/com/jaquadro/minecraft/storagedrawers/config/CompTierRegistry.java
@@ -1,5 +1,6 @@
 package com.jaquadro.minecraft.storagedrawers.config;
 
+import com.jaquadro.minecraft.storagedrawers.StorageDrawers;
 import net.minecraft.block.Blocks;
 import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
@@ -53,11 +54,7 @@ public void initialize () {
             }
         }
 
-        // TODO: Configurable compacting rules
-        //if (StorageDrawers.config.cache.compRules != null) {
-        //    for (String rule : StorageDrawers.config.cache.compRules)
-        //        register(rule);
-        //}
+        CommonConfig.onLoad(() -> CommonConfig.GENERAL.compRules.get().forEach(this::register));
 
         for (String rule : pendingRules) {
             register(rule);
@@ -79,9 +76,34 @@ public boolean register (@Nonnull ItemStack upper, @Nonnull ItemStack lower, int
 
         records.add(r);
 
+        StorageDrawers.log.info("New compacting rule " + convRate + " " + lower.getItem().toString() + " = 1 " + upper.getItem().toString());
+
         return true;
     }
 
+    public static boolean validateRuleSyntax (String rule) {
+        String[] parts = rule.split("\\s*,\\s*");
+        if (parts.length != 3)
+            return false;
+
+        ResourceLocation upperResource = ResourceLocation.tryCreate(parts[0]);
+        ResourceLocation lowerResource = ResourceLocation.tryCreate(parts[1]);
+        if (upperResource == null || lowerResource == null)
+            return false;
+
+        try {
+            int conv = Integer.parseInt(parts[2]);
+            return conv >= 1;
+        }
+        catch (NumberFormatException e) {
+            return false;
+        }
+    }
+
+    public void register (List<String> rules) {
+        rules.forEach(this::register);
+    }
+
     public boolean register (String rule) {
         if (!initialized) {
             pendingRules.add(rule);