DFB, Oh yeah, real high tech stuff. When I build my carry-all platform, I think I will make it only stick about 50-60% as far back as the store bought version. Then I will use bolt on extensions to regain the "lost" capacity. I'm also thinking bolt on rather than weld on diagonal braces so I can get them out of the way when clear loading overhang space is needed but max weight carrying capacity isn't. The concrete weiights could be cast so as to extend forward of the platform, reducing the benefit of leverage just a bit but improving close in manuevering. I'm thinking of trying to brace the vertical to horizontal weld connection on the outside of the 90 degree angle so the diagonal braces won't be so important or missed as much when not affixed. Hope that makes sense.
Patrick