Figuring Cartridge Compliance.. Help!

Chakster... Thank you, I do plan to buy the test LP you suggest.
I bought a Harmon Kardon T65C in very good condition at the suggestion of an audiophile acquaintance. I really did not plan on putting the DL 103 on this turntable; but the other night I hooked it up to see how it would sound, out of curiosity. I have since listened to it for approximately 30 hrs. Last night I attached 2 gms to the head shell (and adjusted the counter weight accordingly) and it seemed to make a qualitative difference in sound. It got me interested in understanding how to calculate effective mass. I have seen some brass counterweights and brass head shell weights, that I also thought I would experiment with. But I am interested in learning to do the Math behind these theories.
rauliruegas- I believe that the effective mass of this Ito Microrace tonearm is 9.5.

raulirugas; thank you for the reference. I have printed it out and am in the process of digesting this article.

Thanks for everyone’s input! I am enjoying this. I have ordered a Denon DL 110 for my HK T65c. I hope that is a much better match for Microrace tonearm. I have several other turntables to sell; and then will hunt for a more appropriate table for my DL 103. I do have one other question.. what is the best cartridge alignment gauge?

Rauliruegas
Thanks for the suggestion.
I like the idea of the MINTLP, but none of this stuff is cheap.
I saw a video with Michael Fremer and he had a protractor with the various arcs on the protractor. Does anyone no the name of It?

Thanks everybody.. Remember I’m a newbie...So a person could get an 8 1/2 by 11 sheet of paper and measure/look up the spindle to pivot arm distance. From that point draw an arc using the effective tonearm distance. Draw a second arc showing the record edge cut it out and then have it laminated. Use this in combination with that 12 dollar mirrored “book mark looking” overhang guage that I bought on Amazon? Checking back and forth between keeping an accurate arc and cartridge angle?
not sure I’d actually do this.. just want to make sure I have the right Idea.