Hi Aaron, quick update.
the test SLG you sent, I can't get it working in one cab with a Dell LCD monitor, wired properly per JROK's d-sub connection.
no picture presented at all with the older green JROK MW board and the newer red JROK MW board (see earlier t-shooting in this thread, as I am 100% confident the wiring is correct and the cab works with all multi-boards from 60-1, 19-1, arcadesd, JROK MW, JROK Berzerk)
So I tried it in another cab with a different model Dell LCD and the JROK Berzerk PCB. I get an image but it has angled horizontal lines and the image jumps all over the place and looks grainy and weird, then the monitor loses the sync, goes black, then starts the cycle over again.
In this same cab, the newer red JROK board generates nothing on the LCD, no signal messages.
I think this proves the SLG has some compatibility issue with the signal coming out of the JROKs.
--on a different note, JROK added scan lines as a software setting in the setup menu for the JROK Berzerk board.