So, don't laugh, but I have been playing pinball for 45 years and collecting for 15 and I just realized that the upper flipper is actuated at a different time than than the lower flipper! Obviously I am a slow learner. On some of my machines the switch gap is huge (GnR) on others its small (JP). What is "spec" on the upper flipper switch gap. Or if not spec, what is "expected" when you walk up to a correctly tuned machine? Thanks for any positive thoughts / input on the subject.