I did the regular 2 batt mod. as for the 2 motors it was a little more difficult, because the motorworks cars are hard wired in. so I pulled one m.w. apart and pulled the motor out. keeping the wires attached of course. I then peeled back the wiring on the whole m.w. where the wires from the motor connect to the pcb and connected them to the proper terminals. and that was that. no help from any web site or any person.
as far as the chasis being similar , I havent seen a ms or a bit-g chassis so I culdnt tell you. We have a limited supply of everything in Alaska and I havent seen anything but zzs and motorworks and those are in very limeted supply. and you cant find **** for parts
