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Saturday 17 March 2018 at 10:38
Looks factory to me. Three to mount the coil bracket.
Oh your saying the mylar is down frist then nail? Take a Dremel and or with hand finishing, polish as best you can and put a 1'' mylar circle over them. I don't think the ball should really ever touch if pops working correctly.
Source: http://pinside.com/pinball/forum/topic/worst-hackrepair-you-ever-saw/page/34#post-4285464