I get a kick out of people wanting to kludge together some non-existent controller that will probably have less capability for a similar price just because they are smart enough to do it or maybe just too cheap.

Good luck.

If your serious you could look at Nevo. Find an old model on line and hack away. Cause your an engineer you know.

Im just being sarcastic to be funny. I admire your attempt at creativity just be careful trying to reinvent the wheel.