Thanks for the mention and the comps!
Some good points raised here.
"Internet fame" is worthless. I too have have made the mistake of recommending someone based on what's I've read. Having subsequently seen the work carried out I've realised that I can only recommend based on what I've actually seen.
Some of this work can be seen in The Black Museum section on my website.
And as regards fame - I don't need it. I always describe myself as a 'jobbing repairer'. If folks want to refer to me as some sort of guru I'll admit it's very flattering but it's really not my sort of thing. I just do what I do, and I try to do the best that I can. That's what makes me happy, as does making my clients happy.
There is some truth that a good service on an alto may not translate to a good service on a bari - but this would be largely down to experience rather than a new set of techniques.
Being cautious is a good approach.
I have a 'little black book'. Actually it's a folder on my computer. It contains names, photos and descriptions of work that's been carried out by other repairers and subsequently brought to me to put right. It's not a small list.
Clients who bring such horns into me often, after being shown what's wrong, ask "Why did they leave it like that??" and my answer is always "I dunno, I've never been able to figure that out". I'm also often asked "What makes a good repairer" - to which the answer is "Giving a damn".
Here's what I do when I'm looking for someone to carry out some work for me, be it a car repair, a kitchen fit, a stove installation etc.
I put a post on a relevant forum and ask for recommendations. I then contact the people who made recommendations to ask if they'd mind elaborating on their experience. You tend to get more detail like this, plus a more personal picture.