I was one of the guys that was on board for CATS original order. Many....many people have gone down this road before you(myself included) and many more will after you as well.
I think once it is done people will pay to have these but it is getting them done that is the hard part.
Please forgive my skepticism but if by some small miracle this plan come to fruition count me in for one tub for sure. If its just a flat chassis I may take one too but I would have to see the finished product first. It is just as easy and alot cheaper to make a flat plate from aluminium.
http://www.rc10talk.com/viewtopic.php?f=28&t=22204