No, this is not really about the Dead Kennedys song, but may belong in Open Forum. Not everyone here has: the time/ experience/ tools to undertake a major repair. The first fork seal change, carb disassembly, etc. can be daunting for the cat with his first old bike. I, personally, HATE changing tires,for example. See what I'm gettin at? Folks wind up at a motorcycle shop for a variety of reasons.
What steps do you take to insure you can trust your mechanic before the work is done?