Spent the day gluing the head plate and fretboard on, then shaping the neck. Still a bit to do at the transitions to the head and heel.
My approach is to get the fretboard perfectly shaped by 'double-sided' taping it to a straight edge/ruler and routing the side of the fretboard by following the ruler with a flush trim router bit. You need to use thick double sided tape, such as picture framing tape, and I also put 'packing' tape between the wood and the double-sided tape to allow me to easily get the tape off.
I then glue the head plate and fretboard on (ensuring that the bone nut fits tightly in between) and flush trim the neck using the edges of the fretboard as the guide. BE CAREFUL at the nut, as the flush trim bit will cut into the neck as it has nothing to follow...
I also left the heel blocks 'wide' at the bottom so I have some wood to play with if the body is not perfectly straight at the cutaway front edge.