Wow, thats really nice. If you ever do a run, I'm interested.
The SW version had a few extras like the disc on the side of the grip, a cover over the ammo feed opening, and the T-tracks on the barrel.
Here are some sites with some great reference pictures and info.
http://www.ima-usa.com/product_info.php/products_id/2449
http://www.brpguns.com/mg34.htm