Got the neck and the headstock done today. It's basically a matter of double taping a straight edge from the nut to the "heel" and routing the straight line.
Then, using a Telecaster neck template upside down stuck to the back of the headstock - the shape can be routed.
As you can see, words like ****, **** and worst of all *************** came streaming from my mouth when I saw that the ******* double sided tape had slipped.
Luckily this whole guitar is to be finished opaque (part of the reason was to hide the five 12mm pieces) so it'll be out with the 10 minute kneadable epoxy and that router boo boo will be long forgotten.
Next: glue two more 12mm pieces to the body end of the guitar and continue the neck lines all the way to the end - so the sides are straight from top to toe. Then: start on the "body" and shape the back of the neck.