Dear Dertonarm: It is not that much: only one hole distance. For the ADC 25 or 20SS the Technihard headshell is out of question.
Right now I'm usin the 13 one with my MS LF-7 and I used a 18 one with the DL-103 LOMC cartridge where in both cases works just fine.
Maybe I have an advantage over you and some other people: I own a " ton " of different headshells that makes me things easy and where I learned that are better options that those Technihard AT headshells, I'm not saying are bad ones but only that are not the best " user friendly " items.
I have a lot of luck with many of the other AT headshell models. In the other side not always we can use a 18grs headshell weight.
Regards and enjoy the music,
raul.
Right now I'm usin the 13 one with my MS LF-7 and I used a 18 one with the DL-103 LOMC cartridge where in both cases works just fine.
Maybe I have an advantage over you and some other people: I own a " ton " of different headshells that makes me things easy and where I learned that are better options that those Technihard AT headshells, I'm not saying are bad ones but only that are not the best " user friendly " items.
I have a lot of luck with many of the other AT headshell models. In the other side not always we can use a 18grs headshell weight.
Regards and enjoy the music,
raul.