check this out

well i decided to go with the ACT 2100 Clutch Kit w/ Street Disc, now ive been reading up and researching for quite some time on these cluths and i found this, "You do have to machine the flywheel, always. The "step height" has to be jsut right, make sure whoever cuts it knows this. For ACT clutches go with a step height of .610 inches. For stock I believe it is .620, but be sure to look that up if you se a stock clutch. Very important." NOW is this somthing i need to tell my mechanic, is he going to be the one cutting it? i just need some help, also do i re'use the old release bearing, cuz people say not to use the one that this kit comes with, and if i cant re use the old one will the mechanic know what to do, do i have to tell him anything or can i just hand him the clutch, i have so many questions just cuz im sick of problems with my dsm and want everything done right the first time lol also labor>?