One other point, in the roms "Burnin' Rubber" and "Bump N Jump" there is only an easy setting, or a hard setting, plus 3 dip switches which are unknown, so I'm not sure why TG refers to a difficulty #3. I haven't seen the original manual for either version, but I will check on wiretap now....(posted 8538 days ago)Ok, as you can see from http://www.spies.com/arcade/switchSettings/BumpNJump.txt
There isn't any difficulty #3, just easy or hard, so the TG information is a tad incorrect. The last 3 dip switches are referred to as RFU, and says "all should be off", so that will be official TG setting.
Mark