Dear @last_lemming: I'm a little confused with your thread. First I seen you own the VPI TT, I don't know where the PL-530 could be the subject.
In the other side, which kind of problems already experienced with that Pionner TT and the 103R?
If what you want is to stay inside the 8hz-12hz desirable resonance frequency you really need to know the real effective mass of your tonearm when the 103R is mounted and to take in count on that tonearm effective mass calculations the precise position where the tonearm counterweigth is " seated " because any minute changes in the counterweigth position affects those calculations.
All depends what and why you want to do that. Ask you before make anything.
Btw, you don't need to add weigth to the headshell you just need to change it for other with higher " natural " weigth.
Regards and enjoy the music,
R.
In the other side, which kind of problems already experienced with that Pionner TT and the 103R?
If what you want is to stay inside the 8hz-12hz desirable resonance frequency you really need to know the real effective mass of your tonearm when the 103R is mounted and to take in count on that tonearm effective mass calculations the precise position where the tonearm counterweigth is " seated " because any minute changes in the counterweigth position affects those calculations.
All depends what and why you want to do that. Ask you before make anything.
Btw, you don't need to add weigth to the headshell you just need to change it for other with higher " natural " weigth.
Regards and enjoy the music,
R.