Thanks for the feedback!
Slight updated version, bigger standoffs and nutted/bolted.
The gussets currently are 3/16, so 1/8th would hold up just as well?
And replacing the bottom gussets with a poly carb bell pan sounds like a good idea.
I am thinking of using this:
http://www.andymark.com/product-p/am-0836.htm
Also I am debating between using eClips or threaded ends on the shafts to hold the wheels in place, would you would guys recommend?