Hmmm. It seems like many people have difficult-to-adjust tonearms, which does take the fun out of fine tuning. And overhang/tangency is always a PITA, in any case. But I always thought that the final tweaking is done by ear. I do start with the two null points on my dB Systems template, and I do start with the top of the cartridge visually parallel with the record. But after that, I listen and adjust to suit. I can't say I've often recognized problems I could trace straight away to tangency; but it has happened to me. Usually, problems with my l-o-n-g line stylus are VTA/SRA, azimuth or (and I don't know why), VTF, or sometimes anti-skate. Although the adjustables do not seem to want different settings for different music, it does seem like some settings sometimes simply change "on their own", for reasons I cannot always determine, so I try to keep a weather eye out for this. I have chronicled the VTA issues and attendant solutions in a dedicated thread.