Lately I have been welding a plug in the end of the lower handle pieces that bolt to the chassis with the single bolt. What happens is people keep tightening the bolt to try and give the handles a bit of rigidity and it ends up squashing the handle and just makes it worse, so they tighten it again and again. I am only putting in a piece about a half inch long and that allows it to sit under the cover plate. I have done probably 10 mowers like this but I haven't seen any long term results to see if this is going to solve one of the handle problems. Anybody else tried something like this?