Tried a little experiment at work this AM, bent this up in just few minutes to see if it was a plausible alternative for some chassis building. 16 g sheet metal, ,simple bends in a hobby vise, and cuts with a dremel. random axle holes as this was a test.possibility's are endless with this design,and certainly an inexpensive option. not a new concept by any means, but one i had not tried yet.
