Don't rebuild yours because of the way mine failed, it was not designed well to begin with! I should have welded it onto the frame but it was just bolted. Honestly I seriously thought about rebuilding it completely before the trip but didn't have time...thought it would be fine, guess not!
The ONLY reason mine failed was because one weld had very little penetration. If it had been welded a little better it would not have broken. But years ago when I built it, I only had a 110v MIG welder. Quite frankly I'm surprised it lasted that long, after seeing how it broke.