@tonificante I have not seen anything like it before, I do not believe that you'll find an easier tutorial than the one you mentioned, it's a very interesting project, but quite unusual.
Honestly, for the price and headache of it all, you're better off purchasing precut pieces on eBay and assembling it yourself. They're around $100-200 these days. I ordered one years ago, I highly recommend going that route.
@acris hi, I've enabled GPIO, I'm using the latest version of recalbox and I've wired the 40 pin connector correctly as far as I know since the P1 joystick works fine.
