Boron Cantilever and Ruby Cantilever, Why Ruby?

Sorry about my error. I just remembered one of the reasons Shure discontinued the V15 was the toxic material in the catilever...

Tzh21y, If you just need a retip and have not broken your cantilever then Soundsmith can replace the stylus only. It cost more because it is more difficult to do. I believe it is $450. Probably still cheaper than a trade in though.

Non-audio curiosity: I know that Berylium is toxic,
but I've not heard that Boron is toxic.
No arguement, just curious.

Both Berylium and Boron are toxic, but in two very different doses. You actually do need a certain amount of Boron and you'll get that through apples, leafy greens, grains, certain level in drinking water and/or multivitamins. In large doses, it does get toxic.

Berylium is really only dangerous when airborne, so machine shop working with beryllium will have very strict safety policies and safety procedures. Otherwise, you'll be fine (unless you decided to chew on the beryllium cantilever, but that amount probably won't do you too much harm although you may want to have your head checked if you do chew on it)

One of these days I'd like to compare my SoundSmith rebuilt XX-2 (snapped cantilever, so replaced with SoundSmith's ruby) with an orginal boron cantilever XX-2.