This may just reiterate what Doug, and perhaps others, have said, but I am not certain that Wally's Azimuth tool is all that necessary. I shared in that tool for a time and on each of four different arms which I had previously set by eye ball - all were well within the 5% electrical readings range as suggested by Wally. In a couple of instances it sounded better a bit further from "balanced" than at exactly balanced. As such, I feel that macroing it by eye, followed by microing by ear is the ticket to azimuth.
