Okay, so I said I'd do this two years ago.... people should harass me.
I've finally documented my Ultimax S-Video mod. It's ALMOST 'touchless', meaning that if you sell your console, you can undo it quickly, and it won't leave a trace. There is some soldering involved, and I ruined a Max Machine by doing it wrong. No, I will NOT mod your Max Machine. They're $900.
http://www.spinnyphin.com/Spinnyphin_So ... chine.html
I've also put the beginnings of some Max Machine programming on there. If people want more, such as how to initialize the machine, make dual-mode C64/MAX programs... or can tell how how the HECK one talks to the tape drive (I've seen copy protection loaders less obfuscated than the Commodore Kernel routines), check out my website and email me.