Throwing in another vote for the Wallyskater. It is what I use. I have found that I must suspend the tonearm itself (and not the finger lift) in order to get an accurate reading. But my tonearm is weird.
antiskate disc
this is not new info, but as I have struggled to adjust the antiskate on my REED 2G(not calibrated), I thought I would try the blank disc method, despite mixed reviews of this technique. I have an ALNIC AMBER cartridge which has a FRITZ GYER S stylus....it is so fine that it immediately cuts its own groove in the vinyl blank disc, making subsequent passes impossible...frustrating!!