TT Guy, you should make more videos of the ones which are more difficult to work on or exhibit unusual problems - but then you've got to remember to edit out the cussing 😄
Humm problem is often cured by cleaning the cartridge body and stylus contacts. There are 4 on the stylus and 4 inside the body. Qtip and alcohol removes it.
I'm not understanding the tracking weight. You balance the arm level (horizontal) but then you move the weight back to zero (adding weight) and then again add 1.5? gr. With my Dual CS-515, I turn the counterweight to be level, then don't touch it, then add the 1.5gr with a separate dial (and then anti-skating on a 3rd dial)