Whoa totally awesome but I don't intend on "modifying" the pcb in any way shape or form / other then attaching the proper JAMMA adaptor to it. I can see how that can be useful, however I'm going to leave it at one specific volume and just be happy with it, if i need to make an adjustment I can always do so I just won't have the same easy access as you showed. totally cool though!

I still didn't get back my capcom classic to JAMMA adaptor to work with the third button for this game so once I get it i'll set the volume accordingly.