Could you explain why do you need a retip of MM cartridge if you can buy NOS Grace stylus, even F14 (RS14) which is huge upgrade over F9 (RS9) of any kind, the RS14 styli from Grace can be Boron/MicroRidge, Sapphire, Ruby and even Ceramic cantilever. Grace made Aluminum with MicroRidge too. This is the best diamond profile you can get, life span can be 2000 hrs! They are rare, but well worth the investment, I collect all Grace styli. Never re-tipped any of my Grace cartridges (I have many of them). SoundSmith actually rebuild Grace, it’s not a re-tip, he can install whole new cantilever with stylus tip. Re-tip is just a tiny diamond replacement on a cantilever using glue. This is
original Grace Ruby, try to find any glue (more
here). This is
SoundSmith Ruby with glue (more
here).
The situation with MC cartridges is another story, you’d better read what cartridge designers think about third party re-tip if you want to know the truth, find Jonathan Carr’s comment on this forum.
Re-tippers will always accept any cartridge for re-tip, this is their job and you will pay for it (very high price). On the other had we have people who have no idea what they are doing and always comment that re-tip is better than the original, at the same time you will find tons of re-tipped MC cartridges on ebay with less than 50 hrs on it (why people are selling them? Think about it).
Here is a typical example of SoundSmith glued stylus tip on Boron Rod cantilever (image from his site again).
And
this is a factory job, nude diamond on boron rod cantilever (image under my macro lens).
What re-tippers can’t get today is Boron Pipe cantilevers (just one example), they can’t mount their styli
like this. Do you see any glue? This is super riggid and super light mass construction (hollow boron pipe and stylus mounted through the laser etched hole). This is how top of the line MM or MC were made in the golden era of analog (not today). I could add more different images I made myself, but I think it’s enough to understand what I mean.
Here is the side view on Boron Pipe cantilever with Nude Diamond. Like Grace it is a high compliance MM (SONY). Same
Boron Pipe cantilever you can find
on the best Grace models. Extremely low moving mass! Another example is Beryllium (Victor X1II), just
look at this.