Of course one can use Adjust+ however they like. I was simply saying that from the video I've seen, its azimuth adjustments don't take into account the inter-relatedness of zenith. The method involves using a spirit level and set of sweeps at different azimuth settings. Then you're instructed to pick the best setting. So given that the tool is trying to devolve cartridge setup into a tuple of prescribed steps, what I noted was seemingly worth noting. Further, I just searched the Adjust+ "Azimuth Compendium" doc for the word zenith, and it wasn't found. At the end of the day, even with o-scopes or microscopes or sound cards with specialized software, this is really not an exact science. IMO, the best we can do is to understand how settings are affected by one another, and then experiment a lot. I suspect that the vast majority of us get to the point of leaving well enough alone sooner rather than later. And I find the claims of things such as 0.001g delta in VTF transforming a system's sound to be bogus.