SS VTA Gauge
Just rip up a 9” piece of wood the distance from the base of the TT to the top or bottom of the tonearm whichever is easier to see. Or the middle if you have a tapered arm with a line like mine.
Anybody can see if the tonearm is parallel like this. And it’s easy to see a 1/16” difference from front to back. 1/16 = almost a half a degree on a 9” tonearm – 2RPi = 56.5” / (divided by) 360 degrees = .157” one degree. A lot of guys like it a little down in the back.