I would send it to Linn, unless you know who they send it to, and can guarantee that they will give you the same specs as they do for Linn. I don't know who they send them to. Troika is a very good cartridge.
MC cartridge rebuild
I'm planning on doing some upgrading on my turntable. I have Linn LP 12 with Valhalla PS, Ittok II arm and Troika cartridge. I like the Troika, but it is due for a rebuild. Should I send it to Linn (even though I understand they farm the work out) or to another company for the rebuild? Any suggestions for other rebuilders?