If it's not too much trouble, could you post a photo of the rear platform you have on your TT? I thought of doing something like that as well, but wasn't sure if the amount of welding and supports needed would be worth the end result.
Where we've been:
2000 Rockwood Roo M-18 Hybrid
2006 Dodge Ram 2500 Auto 5.9 Diesel
Gone but not forgotten -1986 Rockwood 1003 PUP