Everything was fine, completed GREED and bookcase stopped in the middle of opening. Bookcase, Thing hand and Thing flipper are not working now. Test says check switches 53-56 Bookcase optos, Thing opto and thing limiter opto. Bookcase test does nothing. I pulled the bookcase mechanism to make sure there is nothing broken. The crank arms are fine, not bound up, and all wiring is intact. I’m a little ashamed to admit I’m already stumped.