Can't get answer from Soundsmith on retipping ques

.....so figured I would ask it here:). Would appreciate an answer from anyone, esp. from those with experience with Soundsmith. Here's the question I asked, which they've not answered (they returned my call once, leaving a message that said it was answered in the FAQs at http://www.sound-smith.com/retip/, which it's not, and then didn't return two subsequent calls):

"Suppose I have an older (say, one mfd. 15-30 years ago) MC cartridge, and I send it in for replacement of the cantilever+stylus. Even if the cartridge is undamaged, aren't there other concerns, simply because of the cartridge's age, that typically need to be addressed -- for instance, hardening of the elastomer the supports the cantilever, or oxidized coils? If so, what are those typical concerns and how do you usually address them (added cost, etc.)?"

[BTW, the cartridges in question are a Dynavector Ruby DV23R (~30 yo), and an Ortofon MC3000 MkII (~15 yo).]

Also asked them their current turn-around time for cantilever+stylus replacement -- they didn't answer that either.

Thanks!