Dear all, many thanks, for your viewpoints. Who could doubt that Audiogon discussions help progress? I am grateful to you all.
Please note, in my case, we are beyond the zone of obvious errors, bleed, mistrackings, and so on. The Atlas sails throught the test record, no problem, and sounds very good. I have compared with a good mid-level Ortofon, in my system - both are good, but the Atlas is clearly superior. So we are beyond the territory of obvious faults and into the one of refinements and optimalization. The Atlas has been a major upgrade from my Titan. But since it is clearly a better cartridge, I want to tune it as well as possible, and my ears tell me, I still have a way to go.
Stingreen - what arm do you use, the vpi? what is wrong with it?
Folkfreak - azimuth important, yes I know, and thanks for link. Trying to set up my microscope to get it good enough. I went to a shop in Oslo with my older Clavis and Lyra cartridges, and asked for a microscope analysis. However they could not do left-right. All they could tell me was that that the styli were worn, from a side view, and I knew that already.