diff --git a/assets/Data/fab/test.block b/assets/Data/fab/test.block
new file mode 100644
index 00000000..9954869c
Binary files /dev/null and b/assets/Data/fab/test.block differ
diff --git a/docs/src/progress/renderertodo.md b/docs/src/progress/renderertodo.md
index fbd681d8..1198a5cc 100644
--- a/docs/src/progress/renderertodo.md
+++ b/docs/src/progress/renderertodo.md
@@ -1541,6 +1541,7 @@ Block area selection
 
 (04/26/2025)
 Exporting block prefabs to compressed files
+Minor block fab improvements
 
 
 
diff --git a/src/main/java/electrosphere/client/block/ClientBlockSelection.java b/src/main/java/electrosphere/client/block/ClientBlockSelection.java
index 65ef71ad..8c541749 100644
--- a/src/main/java/electrosphere/client/block/ClientBlockSelection.java
+++ b/src/main/java/electrosphere/client/block/ClientBlockSelection.java
@@ -114,7 +114,7 @@ public class ClientBlockSelection {
         );
 
         BlockFab fab = BlockFab.create(dimensions, types, metadata);
-        File exportLoc = new File("./struct.block");
+        File exportLoc = new File("./assets/Data/fab/struct.block");
         fab.save(exportLoc);
     }
 
diff --git a/src/main/java/electrosphere/game/data/block/BlockFab.java b/src/main/java/electrosphere/game/data/block/BlockFab.java
index 0eb5c94e..62f8e59d 100644
--- a/src/main/java/electrosphere/game/data/block/BlockFab.java
+++ b/src/main/java/electrosphere/game/data/block/BlockFab.java
@@ -16,11 +16,20 @@ import electrosphere.util.FileUtils;
  */
 public class BlockFab {
 
+    /**
+     * File version format
+     */
+    public static final int FILE_VER = 1;
+
     /**
      * Size of the header for a block fab file
+     * 1 * 4 for integer ID of the version of this fab file
      * 3 * 4 for the dimensions at the front of the file
      */
-    public static final int HEADER_SIZE = 3 * 4;
+    public static final int HEADER_SIZE = 
+    1 * 4 +
+    3 * 4
+    ;
     
     /**
      * Dimensions of the block fab
@@ -63,6 +72,7 @@ public class BlockFab {
         ByteBuffer buff = ByteBuffer.allocate(HEADER_SIZE + blockCount * BlockChunkData.BYTES_PER_BLOCK);
 
         IntBuffer intView = buff.asIntBuffer();
+        intView.put(FILE_VER);
         intView.put(dimensions.x);
         intView.put(dimensions.y);
         intView.put(dimensions.z);
@@ -74,9 +84,8 @@ public class BlockFab {
         shortView.put(metadata);
         shortView.flip();
 
-        File exportLoc = new File("./struct.block");
         try {
-            FileUtils.writeBufferToCompressedFile(exportLoc, buff);
+            FileUtils.writeBufferToCompressedFile(file, buff);
         } catch (IOException e) {
             throw new Error("Failed to export selected blocks to a file!");
         }