Just picked up a Boomerang the other day (Thanks big time to Pinsider GPS) So far I have the playfield stripped and 2 out of the 4 score reel banks cleaned and adjusted best I know how. Wires are cut to the knocker and credit unit. When I press the credit button the score will reset but then the score motor keeps running. My first EM so lots of learning to do. So far I love working on it!