More work over the last couple of days...
I've pretty much finished the profiling of the neck and I have the basic shape for the head; it just needs cleaning up and maybe tweaking here and there. I cut an approximate angle for the layback of the head (research suggests this changed considerably throughout the years of production) and will refine later.
I've made the neck a couple of mm thicker than my standard 4003, partly to ensure I stay well clear of the truss rod channels but also to maintain a little more stiffness in the finished product. It should make little difference in playability and I hope it doesn't affect tone and resonance too much.
Finally, I routed a couple of shallow channels in the both the neck mortice and tenon to accommodate the pick-up wiring.
Pictures to follow...