diff --git a/core/src/main/java/com/seibel/distanthorizons/core/file/fullDatafile/GeneratedFullDataSourceProvider.java b/core/src/main/java/com/seibel/distanthorizons/core/file/fullDatafile/GeneratedFullDataSourceProvider.java
index f347086e7..f9836416c 100644
--- a/core/src/main/java/com/seibel/distanthorizons/core/file/fullDatafile/GeneratedFullDataSourceProvider.java
+++ b/core/src/main/java/com/seibel/distanthorizons/core/file/fullDatafile/GeneratedFullDataSourceProvider.java
@@ -138,6 +138,17 @@ public class GeneratedFullDataSourceProvider extends FullDataSourceProviderV2 im
 	// world gen (data source retrieval) //
 	//===================================//
 	
+	public byte lowestDataDetailLevel()
+	{
+		IFullDataSourceRetrievalQueue fullDataSourceRetrievalQueue = this.worldGenQueueRef.get();
+		if (fullDataSourceRetrievalQueue == null)
+		{
+			return DhSectionPos.SECTION_MINIMUM_DETAIL_LEVEL;
+		}
+		
+		return (byte) (DhSectionPos.SECTION_MINIMUM_DETAIL_LEVEL + fullDataSourceRetrievalQueue.lowestDataDetail());
+	}
+	
 	/**
 	 * Assigns the queue for handling world gen and does first time setup as well. <br> 
 	 * Assumes there isn't a pre-existing queue. 
diff --git a/core/src/main/java/com/seibel/distanthorizons/core/file/fullDatafile/RemoteFullDataSourceProvider.java b/core/src/main/java/com/seibel/distanthorizons/core/file/fullDatafile/RemoteFullDataSourceProvider.java
index 48c2f4e8f..f9827a0b7 100644
--- a/core/src/main/java/com/seibel/distanthorizons/core/file/fullDatafile/RemoteFullDataSourceProvider.java
+++ b/core/src/main/java/com/seibel/distanthorizons/core/file/fullDatafile/RemoteFullDataSourceProvider.java
@@ -19,6 +19,7 @@
 
 package com.seibel.distanthorizons.core.file.fullDatafile;
 
+import com.google.common.cache.CacheBuilder;
 import com.seibel.distanthorizons.core.dataObjects.fullData.sources.FullDataSourceV2;
 import com.seibel.distanthorizons.core.dependencyInjection.SingletonInjector;
 import com.seibel.distanthorizons.core.file.structure.ISaveStructure;
@@ -32,9 +33,11 @@ import com.seibel.distanthorizons.core.wrapperInterfaces.minecraft.IMinecraftCli
 import org.jetbrains.annotations.Nullable;
 
 import java.io.File;
+import java.util.Collections;
 import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.TimeUnit;
 
 /**
  * Only handles {@link SyncOnLoadRequestQueue} requests (IE updating existing LODs based on a timestamp).
@@ -46,7 +49,10 @@ public class RemoteFullDataSourceProvider extends GeneratedFullDataSourceProvide
 	
 	@Nullable
 	private final SyncOnLoadRequestQueue syncOnLoadRequestQueue;
-	private final Set<Long> visitedPositions = ConcurrentHashMap.newKeySet();
+	private final Set<Long> visitedPositions = Collections.newSetFromMap(CacheBuilder.newBuilder()
+			.expireAfterWrite(20, TimeUnit.MINUTES)
+			.<Long, Boolean>build()
+			.asMap());
 	
 	
 	
diff --git a/core/src/main/java/com/seibel/distanthorizons/core/multiplayer/server/FullDataSourceRequestHandler.java b/core/src/main/java/com/seibel/distanthorizons/core/multiplayer/server/FullDataSourceRequestHandler.java
index f52d623fb..8fdf59012 100644
--- a/core/src/main/java/com/seibel/distanthorizons/core/multiplayer/server/FullDataSourceRequestHandler.java
+++ b/core/src/main/java/com/seibel/distanthorizons/core/multiplayer/server/FullDataSourceRequestHandler.java
@@ -219,10 +219,9 @@ public class FullDataSourceRequestHandler
 		{
 			if (this.fullDataSourceProvider().isFullyGenerated(fullDataSource.columnGenerationSteps))
 			{
-				LOGGER.info("sending - complete [" + DhSectionPos.toString(pos) + "]");
 				requestGroup.fullDataSource = fullDataSource;
 			}
-			else if (!this.serverLevel.isNSizedGenerationSupported() && DhSectionPos.getDetailLevel(pos) > DhSectionPos.SECTION_MINIMUM_DETAIL_LEVEL)
+			else if (DhSectionPos.getDetailLevel(pos) > this.serverLevel.serverside.fullDataFileHandler.lowestDataDetailLevel())
 			{
 				// Make this group unavailable for adding into
 				this.requestGroupsByPos.remove(pos);
diff --git a/core/src/main/java/com/seibel/distanthorizons/core/network/messages/requests/ExceptionMessage.java b/core/src/main/java/com/seibel/distanthorizons/core/network/messages/requests/ExceptionMessage.java
index 2d3a2c049..68d3ec123 100644
--- a/core/src/main/java/com/seibel/distanthorizons/core/network/messages/requests/ExceptionMessage.java
+++ b/core/src/main/java/com/seibel/distanthorizons/core/network/messages/requests/ExceptionMessage.java
@@ -30,7 +30,6 @@ import io.netty.buffer.ByteBuf;
 import java.util.ArrayList;
 import java.util.List;
 
-// TODO appears to be useless yelling at user
 public class ExceptionMessage extends AbstractTrackableMessage
 {
 	private static final List<Class<? extends Exception>> EXCEPTION_LIST = new ArrayList<Class<? extends Exception>>()