I love the Acos Lustre GST-801, it is my favorite arm, I wish they made a long version. It is the only one I change both arm height and anti-skate while playing, it is that smooth. The headshell fitting allows a bit of twist when loose to adjust azimuth and firms up when tightened, even though I would prefer Micro Seiki's adjustable fitting. I use the mirror method for azimuth, a mini-level on the headshell, an acrylic block with grid .... a mixture of techniques, and the blank side lp method to see skate and the effects while adjusting anti-skate force.
The UA-7082 top anti-skate dial is so smooth and precise, my new favorite adjuster, I changed it while playing, but the arm height needs two hands, thus tool-free but not while playing.