@mijostyn, Having looked at lots of stylus profiles under a microscope at various magnifications I think it would be exceedingly hard to confirm zenith angle to say 10 minutes. I'll side with Raul that even with the best tools setting the same cartridge up three times is likely to end up with three different alignments. At the scales we are talking about here the possibility for measurement error is large and even seemingly small errors can be consequential.
dave
dave