I have an opertunity to buy a junk cab that is missing all the boards and has a shot playfield. I want to cut a playfield myself and tinker around making my own game. Basically I just want flippers, bumpers, and slings that work while designing it. Will that be pretty simple to do without an mpu? I would rather just get a solenoid driver board for now while messing with it and figure out the lights and mpu later. Thanks for any tips