Hey Wanners, I have an un built PBG-2 kit and I just checked the height of the fingerboard in the pocket and mine was about 8mm to the fretboard. Yours looks a bit prouder. Make sure your neck heel is seated properly and there is no debris or burs in the pocket.
As DB says better not play with the heel or pocket so I'd see how the action is when you get to putting the kit together and string it up.
Grain looks excellent on the body. Keep sanding !