I just read an online description of this process. And being a machinist, I take issue with a few of the claims. One company claims .0005" difference in your fret levels can cause buzzing.....BULL ****! A human hair is .0035" approx. Noway .0005" is gonna do ****! Heat and humidity changes just from day, and night can cause measurement changes larger than that. And besides the fret board is wood, it's going to grow, and shrink. They claim that they measure the neck in over 6000 places for a detailed model of the neck. Hell we don't measure parts for the Space industry that closely.....more marketing BS. Now for me, I've always leveled my frets by hand, and using a capo as a stop, continued leveling, and moving the capo down the neck giving me an ever so slight taper to the fret height as you go down the neck. I.e 1st fret is slightly taller than the 2nd, and so on. For craps sake, those super duper aerospace tolerances are going to go to crap as soon as you leave the room the guitar Plekd in.