My Lumber Mart charges a good $25 more per sheet, but they're really nice in the back, and will do however many cuts and will be spot on every time. Then I always tip the two guys there for actually caring and taking some time to do so. Luckily they are middle-aged guys, and know wtf blade curve is and to account for it, and cut on the proper side of a measurement.
When Lumber Mart does not have what I need, when I go to Lowe's I tell the guys straight up, hey fellas, I will tip each of you five bucks if you makes these cuts for me, and remember to account for the 1/8" of the blade since this is quite important to me guys.
Never had a problem.