fwiw, i don't do any faceting, i just hit it old school -spoke shave, dragon rasp, chisel, scraper, sanding bar, etc.. imho spending time laying out and maintaining geometry that i'm just going to chop off anyway seems wasteful... but whatever works.
i do like back of the neck templates though. one for the nut area, the 12th, and the heel. i cnc mill them out of thin plexi and compare constantly with the templates and measure with calipers. i find those sliding pin type gauges like General's are "ok" for roughing, but lack detail for finishing and are kinda coarse where the fretboard meets the neck.
sop for me is to use the rasp to carve out a annular channel at the nut, and the 12th or the body joint depending on the instrument to within say .030 or so of final contour and then go in with the spoke shave and slice out the meat in between those spots. using a 12" steel rule keeps me aligned. then i semi-finish, then define the heel and volute areas, then go for final.
you're doing well so far Mr Chin, keep it up!