So I decided to upgrade the whole drivetrain of my bike, including new SLX cranks. I brought my bike to the lbs and had them face the bottom bracket shell. Using calipers, I measure the shell width at 64mm. You guys think that they took off too much, or is this within spec? I'm unsure as to what to do next. I've already spoken w/ the lbs, they said they'll look into it, but i dont know what to expect. Thanks.