This thread provided a little reminder to me that I wanted to send him my camera as well. My viewfinder had always appeared cloudy to me, in particular when I compared it to a Hexar RF that I used to own.
On May 22, the camera was delivered to him, and on May 25, Youxin emailed me to say that he had already completed the CLA on my camera! He told me that my camera is in decent shape, but it had not been opened since it left the factory 30+ years ago. He added that there was a lot of haze inside the finder, and that the camera was mechanically dry as well.
Between the USPS, Canada Customs, and Canada Post, I had to wait until today to get the camera back, but it was definitely worth the wait, and completely worthwhile sending the camera to him. The VF is crystal clear and very bright now, the actions feel much smoother, and the shutter is nice and quiet.
Should it be required, I would send any other camera or lens that needed work to him, without hesitation.