I think it's just a matter of time until repros of those spinners will be made.
Please also add a CPS2 kickharness connector. So it's a drop in in our CPS2 setups.
You can identify functions of pins here:
https://wiki.neogeodev.org/index.php?title=MVS_cartridge_pinout
https://wiki.neogeodev.org/index.php?title=Signals
if we delete the 16MB "vroma0" music file from the menu folder. Will it boot faster? or stop and throw an error?
It should shave off a couple of seconds...
I remember the sound to be corrupted. I could still somewhat make out the music etc.
I think it sounded more like an analog problem, so hopefully it's the amp.
Not sure if some sfx were missing, it has been a year and I currently have no access to the PCB.