I went through this sort of things w/ several different repair people. Wasn't happy w/ the way everyone is ready to do the work, then sits on it and doesn't answer emails once they get it. Seems to be the way it works for most of them, so since I think it's stupid to deal w/ people like that I no longer do. If it breaks it gets sold and I buy another. Usually works out cheaper that way anyway, and if I buy from KEH I get a 14 day no question asked return option, 60 days warranty, and if they need to repair it I get 6 mos warranty on their repairs. I also now primarily shoot MF folders and LF (except for my Leica R-5 which seems to be indestructible) and 90% of the time I can fix them if they break.
It's a policy that has saved me a lot of grief and honestly a lot of money. Why frustrate yourself w/ bad service, no matter what the quality once you finally get your gear, if you don't have to? And you don't.
As for Steve Choi, the last time I sent him a Welta to have the shutter repaired, once I finally got it back I fired the shutter about 5 times and one of the aperture blades came loose. His attitude was so crappy when I emailed him that I just sent the camera over to Mark Hansen in Portland who told me he regularly gets stuff sent to him that Steve has fouled up. Turns out that the aperture blade had been installed wrong from Steve's previous "repair". It was actually Choi that prompted me to adopt my "no send out to fix, just replace" policy.