Bringing the back of the neck down to the profile line with the block plane.
The centerline plane from the first to the 11th fret must be perfectly flat. Once flat, draw the centerline - this must stay visible during the rest of the neck profiling procedure.
The first and 11th fret profiles have been cut with the rasp and the 4-in-hand file. Note the neck profile jig between the files.
Use the rasp and file to join the 1st and 11th fret profiles
Create the neck profile by first creating the primary facet with the rasp at a 45 degree angle as shown, then round over with the 4-in-hand file
The profile between the 1st and 11th frets is established. Do not touch the centerline.