When you recorded that song for Guitar Player's Soundpage in 1988 it didn't even have a melody. Back then it was just a performance piece with all the hammered arpeggios. I'd always been uneasy about putting a melody over it. I'm really happy with the way it turned out, though. The album version won't be the same as the demo, but that doesn't mean it's worse.
Arrangements never end.
Every time you perform, you can change some little thing you didn't like on the recording. The recorded version is not the end-all, and not realizing that can really strangle the attitude in a session. This is something that I've had to learn. I definitely freaked out while I was doing Surfing. I thought it would be the last record I'd be allowed to make, so it had to be perfect.