RE: Am I expecting too much....
You are going to put a BGX-1 in the Giant U-Can-Do????
Wouldn't this be too much?
I have a BGX-1 and I ended up putting in a Magnum 1.80XL FS into the G-UCD. The weight was just about perfect, provided I threw the battery pack in the back.
BTW: The wrinkles on mine was a horror show. I ended up spending about 4 hours eliminating them. It looks fantastic now.