When you hit the right flipper, the score is intermittently increased by 50 points every third or fourth flip. A friend went through and saw that some of the capacitors on the switches had been clipped and some had not been clipped. He suggested we clip the rest which we did. Still having the issue. The only thing we can find that scores fifty points is the slingshots and we made sure that the switches on the slings were properly adjusted. Any ideas? Flipper diode issue?