Good tip on the wrench Mike.

Going back to the support brackets, specifically the "tube brace", it would appear that this bracket is designed to cradle the T20. The T20 has that flat spot on the bottom (and top) of the case and it would make sense that the T20 would rest on the middle of the brace. You'd never be able to see it with the frame in the tub, but it doesn't look like the flat spot on the T20 would line up with the tube brace. The T20 sits too far back to be supported by the brace of you weld it on the high point of the tube. I took this pic with frame out and upside down with T20 mounted. Check it out: