I've got a Williams EM that was not scoring right. The 3000 point switch was scoring 2000 and the 5000 point switch was scoring 4000. It turns out that two of the teeth (one on each side) of the impulse score motor cam were broken off. I'd prefer to replace the cam, but I know I will have a hard time finding one. Any ideas for a fix? Should I try to melt something on? I also thought about drilling a hole below and looping some stiff wire around. What's the best approach?