This thing has multiple problems, if done right, redesign is must and necessary. These parts are just for boxier battery, no need if round type battery is available. 11_fixed_backbot.stl 020_fixed_Battery_Holder.stl Front hub or something very close to it, beefier and ,more space to actual function correctly. 13_fixed_front.stl Front nose, more space to mounting screws and for steering slide 32_fixed_front.stl Wider wheel, if needed. There are still long way to go...