I don’t know if this has been brought up yet , but I just sold and set of a premium for a client and the helicopter mech was playing smooth and then all of a sudden the blades tighten and the ball gets stuck . It seemed that the ball would hit it just right claiming it to jam . . It turned out to be the small metal plate underneath the playfield . It was to close to the rod and it was getting caught on it causing the blades not to turn . I just loosened the two screws moved it back just a bit and retighten Super easy fix just in case someone runs into it .
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