Landed a grail on Sat! Cabinet is in excellent shape albeit missing side art. Marquee and bezel are in decent shape and WG monitor looks great (I noticed neck board is cracked, but had previously been jumpered). Came with complete manual. Only downside seems to be the non-standard (Willis?) CP/CPO. Game plays, but displays an error at times and gameplay stops. All I've checked so far is PS voltages which (measured at supply) are good. There appears to be a weird hack (multiple jumpers and 2 electrolytic caps) - might it be related?

