Whether bike or auto repairs, I never feel like I am paying for labor, blood, and bruised knuckles. I'm paying to have the thing fixed right. Personally, if they can handle the job in ten minutes, all the better. I'm a little surprised they could interrupt other work, get the bike on the stand and accomplish this in ten minutes, unless you only count the time he actually had the tools in hand.
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Some people are like a Slinky ... not really good for anything, but you still can't help but smile when you shove them down the stairs.