diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/config/ConfPaths.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/config/ConfPaths.java
index 1e34ae47..b74b86a5 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/config/ConfPaths.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/config/ConfPaths.java
@@ -44,6 +44,7 @@ public abstract class ConfPaths {
     public static final String SUB_MODSPRINT                             = "modsprint";
     /** No trailing dot! */
     public static final String SUB_OVERRIDEFLAGS                         = "overrideflags";
+    public static final String SUB_BREAKINGTIME                          = "breakingtime";
     public static final String SUB_SPEED                                 = "speed";
     public static final String SUB_VERTICAL                              = "vertical";
     public static final String SUB_VERTICALSPEED                         = "verticalspeed"; // Phase out.
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/config/DefaultConfig.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/config/DefaultConfig.java
index 9b46e2fc..92483d10 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/config/DefaultConfig.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/config/DefaultConfig.java
@@ -616,6 +616,7 @@ public class DefaultConfig extends ConfigFile {
         set(ConfPaths.COMPATIBILITY_EXEMPTIONS_REMOVE_LEAVE, true, 785);
         set(ConfPaths.COMPATIBILITY_SERVER_CBDEDICATED_ENABLE, true, 785);
         set(ConfPaths.COMPATIBILITY_SERVER_CBREFLECT_ENABLE, true, 785);
+        set(ConfPaths.COMPATIBILITY_BLOCKS + ConfPaths.SUB_BREAKINGTIME + ".IRON_BLOCK:PICKAXE:DIAMOND:12", 1);
         set(ConfPaths.COMPATIBILITY_BLOCKS + ConfPaths.SUB_ALLOWINSTANTBREAK, new LinkedList<String>(), 785);
         set(ConfPaths.COMPATIBILITY_BLOCKS + ConfPaths.SUB_OVERRIDEFLAGS + "." + Material.SNOW.name().toLowerCase(), "default", 785);
         // Make blocks ign_passable+ground_height.
diff --git a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/utilities/map/BlockProperties.java b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/utilities/map/BlockProperties.java
index e1673097..2164498c 100644
--- a/NCPCore/src/main/java/fr/neatmonster/nocheatplus/utilities/map/BlockProperties.java
+++ b/NCPCore/src/main/java/fr/neatmonster/nocheatplus/utilities/map/BlockProperties.java
@@ -427,6 +427,30 @@ public class BlockProperties {
             return efficiency;
         }
 
+        /**
+         * Add properties defined in a (config line of) string.
+         * 
+         * @param def
+         * @return
+         * @throws All sorts of exceptions (number format, enum constants, runtime).
+         */
+        public BlockBreakKey fromString(String def) {
+            String[] parts = def.split(":");
+            // First fully parse:
+            if (parts.length != 4) {
+                throw new IllegalArgumentException("Accept key definition with 4 parts only, input: " + def);
+            }
+            Material blockType = Material.matchMaterial(parts[0]);
+            ToolType toolType = ToolType.valueOf(parts[1].toUpperCase());
+            MaterialBase materialBase = MaterialBase.valueOf(parts[2].toUpperCase());
+            int efficiency = Integer.parseInt(parts[3]);
+            return this
+                    .blockType(blockType)
+                    .toolType(toolType)
+                    .materialBase(materialBase)
+                    .efficiency(efficiency);
+        }
+
         @Override
         public int hashCode() {
             // TODO: ...
@@ -3086,6 +3110,19 @@ public class BlockProperties {
      */
     public static void applyConfig(final RawConfigFile config, final String pathPrefix) {
 
+        // Breaking time overrides for specific side conditions.
+        ConfigurationSection section = config.getConfigurationSection(pathPrefix + ConfPaths.SUB_BREAKINGTIME);
+        for (final String input : section.getKeys(false)) {
+            try {
+                BlockProperties.setBreakingTimeOverride(new BlockBreakKey().fromString(input.trim()), 
+                        section.getLong(input));
+            }
+            catch (Exception e) {
+                StaticLog.logWarning("Bad breaking time override (" + pathPrefix + ConfPaths.SUB_BREAKINGTIME + "): " + input);
+                StaticLog.logWarning(e);
+            }
+        }
+
         // Allow instant breaking.
         for (final String input : config.getStringList(pathPrefix + ConfPaths.SUB_ALLOWINSTANTBREAK)) {
             final Material id = RawConfigFile.parseMaterial(input);
@@ -3098,7 +3135,7 @@ public class BlockProperties {
         }
 
         // Override block flags.
-        ConfigurationSection section = config.getConfigurationSection(pathPrefix + ConfPaths.SUB_OVERRIDEFLAGS);
+        section = config.getConfigurationSection(pathPrefix + ConfPaths.SUB_OVERRIDEFLAGS);
         if (section != null) {
             final Map<String, Object> entries = section.getValues(false);
             boolean hasErrors = false;