Fidelity Research FR-7 Repair

Dear chaksrer, you are again back to parts. Lets talk about them.
The coils are the most difficult to repair. Nobody wants to mess
with those. Then there are dampers. No retipper has the ''original''
but, say, 3 unknown kinds meant for different compliance. The
most easy job is to supstitute cantilever/stylus combo. Stylus 
only retip is much more difficult to do then cantilevr/stylus combo.
But the most  people are arguing about this part. So the ''most
people'' have no idea what they are talking about. Think about
LP 12. What are original and what improved parts? Who can
''compose'' one LP 12 from ''orignal parts''  or, to put this otherwise,
what are originl parts by an  LP 12? 

Soundsmith said that the aluminum they use is not the same as the aluminum that the original cantilever was made from so a choice based on that was irrelevant (my words). The strongest option is boron so I went with their recommendation on that. Should I be asking about cantilever length?

boron usually goes from Namiki in precut length. IMO ask as original length and if needed they will trim it.

I sent them an email. They're very responsive. Thanks for the assistance everyone! I really appreciate it.

Update, they trim by hand to match length. So, no worries there.