Sorted the ball trough fault and m/c behaved for several games.Ho ever when ball lock was activated on ball 1 lock the m/c decided to chuck 2 balls into playThis has been a n ongoing fault over all remaining games.On checking the newly installed switches the middle rt switch only beeped infrequently but when flicking the switch diode it beeped every time.Points to a faulty diode but this is a sheathed diode.Can anyone tell me what type of diode this is?Nearly sorted but not quite there.Cheers for any advice forthcoming.