I have a Russco Studio Pro Model B turntable That I cleaned up and repainted. it is practically like new. I cannot find any info. on the tonearm that was with it. I have a picture of it in a different post. My question is: how do I know where to mount the tonearm if I don't even know what it is and I have no template? Forgive my ignorance, but I am just starting to get into vinyl. Thank you!