Dear Jeff: IMHO I think that you don't necessary lose the azymuth adjustment because you can find other headshells with azymuth adjustment.
Don't worry that a change in the resonance frequency of the tonearm/cartidge combination occur because the quality performance of a cartridge depend not only on that resonance frequency but in other critical factors like: the resonance behavior between the headshell/cartridge combination where even with the same headshell weight if you try that same cartridge with another headshell ( same weight ) that is build with a different material or in a different shape the cartridge performance change according that headshell modifications.
IMHO the relationship and overall behavior/performance between cartridge/tonearm is extremely more complex that only tonearm geometry, set-up or resonance frequency.
Regards and enjoy the music,
Raul.
Don't worry that a change in the resonance frequency of the tonearm/cartidge combination occur because the quality performance of a cartridge depend not only on that resonance frequency but in other critical factors like: the resonance behavior between the headshell/cartridge combination where even with the same headshell weight if you try that same cartridge with another headshell ( same weight ) that is build with a different material or in a different shape the cartridge performance change according that headshell modifications.
IMHO the relationship and overall behavior/performance between cartridge/tonearm is extremely more complex that only tonearm geometry, set-up or resonance frequency.
Regards and enjoy the music,
Raul.