I don't have a neck dive problem with any of my archtops. But I somehow managed to play an SG for 6 years back in the olden days and it had the old heavy Grovers on it. Maybe I just got used to dive. I also tended to wear it a little higher than Frank or Carlos. I kinda feel like by right elbow took care of it.

On another note: Zappa tapping in '76? Interesting...