Hi all, new to this and the site. So me and my son have decided we are going to build a battle robot. More for him obviously haha. So would appreciate any help, tips our know how's. First dilemma is I have numerous cordless drills, x2 electric mobility scooters and a kids ride on electric car. My question is which would be best to strip down and use parts from. My son has decided he wants a spinning weapon.