I'm a bit different to other builders in this reguard - I don't even try make my fingerboard look nice until after the guitar is painted. After it's radiused thats it until the end. I sand the inlays and wipe the glue off from when I glue/hammer the frets in, but that's it. I only radius at 80, 120 and 320. Past that I dont bother as I clean it up at the end.
After I paint theres always a little bit of paint that gets in under the tape, so anything before the paint stage is work on vein (using my build methods) - after it's painted, cut and polished etc etc, I then razor blade the timber between the frets (like other people razor blade their binding) - only takes a few minutes to do the whole board, gets rid of all the paint, dirt, scratches etc from the build and looks like fress planed wood. I just think of the razor blade as a miniature hand plane. Then I wax and it's ready to get assembled.
I was going to say.....
actually it's not. It's .819", or 13/16th", or 21mm at the first side marker. It feels even thinner because I start the carve half up the side of the fretboard and remove a lot of wood from the sides of the neck. You can see the fretboard on both sides from the back. It is 5/8th" of neck, which gives me 1/4" under the truss rod and a 3/16th" board.
Then I compared that to my single cut and found it to be a little thinner, with a half inch of neck wood and a little thicker board.
This will lose a little more when I contour the neck to body join and blend everything in.
You seem to have boiled the build process down to the bare essentials required to get a high end result. I'm impressed with your work.
SR