Originally Posted by Dave Mayer

the best mechanic I came across was aceing the most complex bike related tasks that a mechanic can be expected to undertake after only a month of evening tinkering. This included wheelbuilding, building up a bike from parts, the complete overhaul of freehubs, derailleurs, bottom brackets, unsticking frozen stems, etc. For the he'll of it I decided he should try to fix a somewhat sticky dual-pivot brake. It was completely disassembled, really-lubed and reassembled perfectly on the first (brief) try.