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Saturday 19 May 2018 at 15:56
Hello!
It's strange what you are describing . although sttng is a very difficult pinball to shop out, once all it's OK, I don't have the behaviors that you got.
Ball thought problems are very common on sttng.
If you already changed opto boards, try light sanding the ball thought plate. I mean the V...
Source: http://pinside.com/pinball/forum/topic/sttng-owners-question#post-4406568