I believe it's "don't let perfection be the enemy of good enough"I believe that you are making "perfect" the enemy of good with your TB concern. Understandable.
rcs - perhaps you've addressed it already, but what about that correction shim? Seems like a cost effective way to appease your inner OCD monster? (Not mocking you, I know how it goes)
My 2 cents on the "master" mechanic... Education and training are not the end all, be all of a given field. It does tend to assure much greater chances of quality, but as I'm sure you've seen, spending 10s or 100s of thousands of dollars and years of training isn't a guarantee of having a good doc... Curious how many potentially life threatening or life altering mistakes you've seen docs make?
Find a mech who answers your questions the way you want, who strikes you as honest and will stand behind their work. "Master" means little if they don't care about you or your car.