rauliruegras you have to be kidding. The only error in the recording would be if the TT speed were set incorrectly. The only thing you care about is the actual resonance frequencies which is what you are measuring. This also gives you the ability to adjust if you have to by adding or subtracting mass. All that other stuff as far as the real world matters is unnecessary complexity and difficult for us normal folks to understand. Watching a tonearm vibrating is easy and sort of fun.
There are many inexpensive alignment protractors out there. You can actually make one your self. Get to it rauliruegras. Give you something creative to do.
There are many inexpensive alignment protractors out there. You can actually make one your self. Get to it rauliruegras. Give you something creative to do.