Frankly, I would question Mr. Mason's business sense. If he finds he's getting more cameras than he can possibly keep up with, he should simply respond to inquiries by saying he can't accept any more and "give me your name and email and I'll put you on my waiting list. First come, first serve." Then you could send your Zorki/Fed/Kiev bodies to Oleg and be better off in the bargain. But when this guy responds with "my repairs these days are limited to opthalmic equipment" what message does that send? No more weird rusky cameras is the message, and in the meantime, sir, can I please have my Zorki back? Please? Sir? Hello, can you hear me now?
My friend, Phil Barton, of Spotmatic Users Forum on Yahoo fame, uses Alan Turner in Phoenix, who has good ebay feedback and works on Kiev MF cameras, etc. If you go onto oivay and type in mjatinaz77 you'll be able to locate him. Phil says he does good work.
OTOH, if your camera is a Pentax, try Eric at
pentaxrepairs@aol.com. He's the retired head of the Pentax repair division. He does superb work. But, he might just want to fiddle around with a Zorki 4K for the hell of it. And his turn-around time is super fast.