Thank you Brian for your great work.

I was epsecially looking forward to this change:

- Add adjustment "SWAP L. SLING/FLIPPER COIL" (default: NO), for owners who
wish to rewire their games by swapping the coil numbers for the left
slingshot and the left flipper. This eliminates the buzzing noise from the
left flipper when held.

So, I set SWAP L. SLING/FLIPPER COIL": YES and changed these coils' wires.
Left sling shot and flipper worked a they should, but right flippers or slingshot didn't work instead of that the left jet bumper.

Setting the adjustment back (Swap L. Sling/ Flipper Coil: NO) everything on the right side is working as before (also on the left side inclusive the beeping)...

Any suggestions/ ideas..?

Never mind. It just sounds fantastic to get with the coil swap rid of the beeping (and mine is really loud).

Set "SWAP L. SLING/FLIPPER COIL: YES" and change the coils' (left sling <-> left flipper) cables, that's easy and all.

Incredibly the beep ist (almost) gone. Feels like a new pinball machine now.

Thank you very much, Brian!