Setting Azimuth

I haven't used it but I would recommend looking into the Soundsmith "Counter Intuitive" which allows precise adjustment of azimuth AND tracking force. They are currently backordered but I'm going to pick one up when available. Meanwhile, I've had my Scout for like 8 years now and agree that getting the azimuth correct is challenging and it is particularly hard to do so without upsetting your tracking force adjustment since when you move the counterweight laterally in inevitably alters the tracking force. What I have done is purchased rubber "O" rings which fit snuggly around the tonearm shaft at the rear end behind the counterweight (i.e. the "stub" end). I slide a few on and then set my tracking force approximately where I want it. Then I do the azimuth by swinging the counterweight into the proper position. Finally, I go back and add or subtract "O" rings to marginally increase or decrease the tracking force. (Each "O" ring works out to approximately a tenth of a gram). Again, the "Counter Intuitive" seems like a much better solution but my approach has also works quite well. One additional thing I would say is that your azimuth adjustment is probably LESS critical given the stylus profile of the Zephyr, which is designed to account for "azimuth roll". Other cartridges will require a more precise adjustment of this parameter depending upon how forgiving the stylus profile is. So I am a bit surprised that you are not getting an even channel balance unless your azimuth (or some other parameter) is way off the mark.