On a Pi 3b running Recalbox 8 off an SD and using USB encoders. I've done a reasonable amount of research on both Google and the forum without finding a solution.

I've been converting a Pandora's Box 4S+ cabinet, and those have both Start and Coin on the Start buttons (you hold P1 Start for 5 seconds to exit a game). So the cabinet only has those two Starts and adding buttons isn't currently an option.

I've tried to be clever about this in a few ways, none of which worked out:

• I first wanted to have both Start and Select on just Start, but that's not allowed by the bindings menu.
• Then I hoped I could use each player's Start as the other's Select, but the menu only recognises one encoder when buttons are being configured.
• I can't use the built-in Retroarch "hold start" combo because this opens the menu; this is a cabinet for use by the public, many of whom are young kids who could seriously mess something up.
• I've thought of Python scripts, but those apparently only take GPIO input.

I'd like to know if what I'm trying to do is possible and how I could go about doing it.

Thanks in advance for your time.