Iknow HPI makes an upgrade drive cup, they have a few different sizes take on up to a lhs and see if they can get you one of them and see if that helps out. For the drive shafts URC site shows they are 87.5mm long so i may buy the hot bodies 90mm ones and see if i can get them to work. Hell might be getting a second job just for my tinkering on this but hell, this race season ill be running a redcat and damn proud to be.