Not bad. It was a while ago so I don't remember the specifics. I think there were a couple wires that behaved... unintuitively. But a few trials-and-error and I worked out the kinks.
Yeah, I don't especially care if people consider it cheating. I'm just playing for fun, not to dominate leaderboards (and I don't dominate leaderboards) - anything that makes playing more fun for me is fine by me and not my concern whether or not it is fine by others.
I'd like to use the minifrets like many others can but am physically unable, so I rigged an alternate that let me have the same fun the thin-fingered folk can have.
(FWIW, to date I have not yet logged one score on that guitar yet that is a new high score for me)