Is the VTA shim for Ortofon 2M series a known quantity? Seems like it might be by now. I don't have a lot of faith in my ability to eyeball VTA adjustments (nor patience), and would like to settle in with a 2M Black (perhaps Bronze). RB303 in Planar 3.
Rega RP3, TTPSU, Groovetracer delrin, reference subplatter & counterweight, Lim double pulley
Shelter 501-II with Soundsmith Level II, Heed Quasar