Ok so my drills arrived yesterday, Yay! But the reverse threaded screw in the clutch seems to have a torx head, and annoyingly I don't have screwdrivers for those. This may seem like a silly question, but does anyone who has opened up Black and Decker drills before know what size screwdriver is generally needed for these? (I'd totally measure it myself but I can't really be accurate as the chuck is in the way.) I'd rather spend money on 1 good screwdriver that fits instead of a pack of different sized naff ones which will get chewed up easily.

I'm starting to think of trying a 4WD wedge robot, but I've just watched a Youtube video showing the insides of Tormenta 2 and noticed that it used only 2 85A Botbitz ESCs for 4 wheel drive. I was just wondering how that is wired, and if people usually use 2 ESCs for 4 Wheel Drive Robots? I thought that only 1 of those ESCs was used for each motor.
Thanks.