@lewm I still not get it how the OP goes about doing this floating arm. Is he attaching some kind of string to the headshell and then zeroing the digital scale with no AS and go from there?
Every tonearm has some degree of AS even when the setting is at 0, so even the smallest angle on the string would affect the value.
I use Analogmagic as my baseline, then move from there.
I believe that with either the Wallytractor (which has the limitation of not having all the spindle to pivot arches) or the Smarttractor and Analogmagic I can set the cartridges very easily and precisely.
what are your thoughts?