I've been thinking about this for the past few days. It seems the position of the belt around the waist seems to pull me more vertical when doing the dips. Since you need to lean forward to hit your chest, it seems it would be better if the weight was attached somewhere around your shoulders. Is there a harness designed like that? If not, I think using a backpack, but hanging it on you backwards would help keep you leaning forward better, than the weight hanging from your waist. Any opinions on this?