As some of you all know I've had some strange issues with the optos under my demogorgon over the last year+ that I have never been able to resolve. Stern had me replace nearly every single opto under there, swap node boards, you name it. Basically it came down to 2 issues which continued to be a mystery,
1. The center lane exit opto under the demogorgon would sometimes not register a clean shot to complete words or start demogorgon modes
2. A clean mystery shot would sometimes trigger twice or not at all.
After a lot of back and forth, and even Lonnie checking out some of the issues, Stern sent me all new one way gates for the entire demogorgon area. Lonnie, from a code perspective, had a couple of ideas. He believed that the one way gate was failing to stop the ball from entering back into the center lane exit opto and that he believed the drops may be a tad low causing the ball to sometimes hit in such a way that it would bounce around and be missed by the center lane exit opto. Apparently there is some code in that area that is expecting the one way gate to be doing it's job.
I took the machine apart today and replaced those one way gates. It's far to early to tell if that will fix anything but the one in question did look a tiny bit different. The big thing though seems to be the drop adjustment. Mine was in fact low by a tiny margin. A bit more on the left than the right. I made the adjustment to that and the ball does seem to be moving smoother through that whole area.
Fingers crossed that the combo of the new one way gate and the adjustment of the drops resolve the mysteries.