Removing cams from early Bally and most Gottlieb EM score motors can be
difficult. The main problem is that several massive switch stacks are
positioned such that they cannot easily by bent back to free the cam. One
relatively easy way to solve this is to remove one of the two screws from
each stack. Then loosen the remaining screw. This allows the stacks to
pivot out of the way, permitting easy removal of the cam.
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