04-07-12: GeochI don't know if you saw the youtube video I included in my previous post. It shows there's no touching the arm tube, even with background being out of focus. And the adjustment is done at the pivot area.
I see that he abandoned the provision of alignment by the headshell (the only right way) and adopted the Triplanar's method of align the azimuth by twisting the arm tube (very convenient but wrong).
Thanks to Vetterone's explanation, I get a better understand of the azimuth on the fly adjustment and the bearing arrangement. I think the 3P's bearing design is brilliant.
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