Generally I think my previous necks have been a little too thick, except for the one where I went too far and the carbon fiber is actually visible on the bottom. This time I drilled a series of holes on the back of the neck. My theory is that this will tell me to slow down when the hole disappears as I plane or rasp it. So I can take it down it bit farther and still have 1/8 inch of bamboo left before I hit the carbon fiber.
FWIW, this is my first fretboard with binding, and when I glued the fretboard to the neck, to my horror, glue started rising up from the bottom of the fret slots next to the binding in a few places. I think I got them cleaned out ok with some index cards, but next time I will look more closely and fill any gaps with dust and CA before glueing to the neck.
