Just picked up an LW3 that needs some work. I'm thinking it's stuff I can d, bumpers, flippers and a good cleaning.. Was wondering which ROM's were a must to upgrade for this machine. It is running display version A-2.01 and CPU 2.0. The sound ROM's are 0601. I don't want to dump a ton of money into this machine if it doesn't need it. Which ones should I be replacing?