My $.02:
Follow their instruction to the letter, go slowly, and practice on a few beaters until you get the feel of it. Remember, corners then flats. Grays then whites.
A quick tip for speeding up bevel reprofiling is to tape rough grit paper to the stones. I did mine much like a sanding block and taped the far side, sat them in the channels and reprofiled with no problem. Best of luck.