With all (earned) respect to your hat, the problem I have is that a single person (who happens to be a competitor) is able to defame a gentleman who has done some very good repair work for me in the past-- Mike Trost, of the Fix Old Cameras youtube site is also the man who runs Phototronic in Topeka, KS-- and no one's allowed to defend him.
If the claim of shoddy workmanship could be substantiated, it would be one thing, but at the moment, we've got a vague statement about a video (or videos) that not only seems wildly out of character, but cannot be found.
That seems genuinely unfair.