Six weeks since starting this challenge and I'm quite pleased with how quickly I can now identify the notes on the fretboard.
I have added translating the tab I read into the note names and also scale degree (1 2 3 4 5, etc). I'm also thinking of the boxes in terms of note names and scale degrees, e.g. Box 1 = 1, 3b, 4, 5, 7b, 1, 3b, 4, 5, 7b, 1, 3b
and in terms of the BB boxes
BB1 = 7b, 1, 3b, 4
BB2 = 5, 7b, 1, 3b
BB3 = 1, 2, 3, 5, 6
How is this helpful? Well I now can hit a classic Albert King lick in any key because I know the scale degrees:
5 3b 1
for BB1, that the top note of the box (4) bent up a whole step (5), followed by the next 2 notes down in the box, 3b & 1.
Bottom line is that this is leading to greater mastery of the fretboard.