Excuse the mess and chaos all around, this obviously isn't where it lives... just where I left it because I can't be arsed to do any more tonight.
Finally got this bad boy upstairs. Rotated the monitor, fitted a 'coin up' button where the rusty old coin reject button was, swapped in an Alberto 1p CP, with a LS56-01 plus the Kowal short throw mod, a shiny new set of Qanba 'Gravity' mechanical switch buttons, removed the incredibly loud PSU fan and replaced it with a nice quiet Noctua, screwed the PCB and JVS ->JAMMA adapter onto the board like a grown up, and gave it a bit of a clean and tidy.
The gold start button was simply because it was the only spare 24mm button I could find tonight, but I think I'm keeping it. I quite like it.
Just need to get a move strip printed up and it's sorted.
It's actually in pretty good cosmetic shape. When I bought it I planned to tart it right up, but I'm more than happy with it as is. It'll stay this way now for the forseeable.