One more reason I trust no one to work on my bike. Even when I wasn't changing tires myself, I took the wheel to the tire shop and made sure they put the tire on the right way. Prior to taking the wheel off, I marked each rotor with the marker by putting a big letters "R" and "L" respectively, so it was easy to figure it out when the wheel was off. It's very little extra effort to get it done right, so why not.
That's a great idea
and I think I will stamp an arrow on mine so I can verify it after the dealership has done the work.
