I like to raise and lower the stylus into the gel surface of my DS Audio ST-50 a few times while checking with a Zeiss D40 loupe. Funny thing is, when I do it with my SME 3009 tonearm, the stylus drops at a slightly different place each time. I just raise and lower it with the SME damped lowering device. Maybe the anti-skate device is moving it sideways.
With the Holbo air bearing system the stylus drops at exactly the same place each time. There is no anti-skate with a tangential tonearm. I have to move the ST-50 a bit when the stylus is clear to expose a fresh bit of gel surface.
The tonearm raising mechanism in the Holbo is very different. The device includes a rod that runs virtually the full length of the tonearm support rod, rather than the very small lifting pad in the SME. It is a different kind of precision

