Like you Agrarian, I have recently been hit up by friends to see if I could fix saws.
sometimes it is just best NOT to tell someone... that you just fixed your own chain saw. lol. "yep, pulled off the cylinder, put in new rings, upped the pulse line and fuel line/filter... and rebuilt my carb. tuned it up High jets and Low jets... and now idles perfectly... tops out with much more power, etc... where's the 'L'... lol, that's blah, blah... blah! the friends next comment most likely will be: "oh-h... so you know how to work on and fix chain saws!!? well, hey here is what mine does now, could you look at it ... maybe?'
I told a farmer friend of mine that I had recently got a vintage saw of mine to run and cut great after many years of just lying dormant in its carry case... then how " my 019T was acting up, fixed 'er right up... but I did this and that after some R&D online, service manual"... etc... "oh, so you know how to work on them, huh?" then he said, "well... I can't get mine to just run right. was thinking need to take it back... to the shop."
well, comment more so just for the heck of it, I would help this guy with about anything I could... but, he had just rec'd it back from the shop not too long ago. and he knows how to take care of equipment...
help someone and suddenly you may be in the chainsaw repair business. still, some of us love to meet a mechanical challenge head on.... so it goes!