Good video by the way. Please see if I am understanding this correctly. Top of part is 2.4855, bottom is 2.4255, a differance of .060, plus a stepdown of .025 for a total width of groove, or relief, is .085. Is this correct ? Thank's . Harold C

But after watching video again, the differance of .060 is total width of relief & cutter is .035 with .025 stepdown ???