DIY part II
I finally found a decent description for neck radius and back contours, with some lovely, if misleading diagrams (typically you'd read that as the distance between the two endpoints along that curved path, but a radius is the distance from the centre of an arc to its outer edge - it defines the curve not the width of the fretboard).
Warmoth, much like Allparts sell ready to finish/assemble parts for DIY electric guitar builders. I hesitate to say lutiers. Sort of hold that skill in higher regard. Someone who designs, shapes and actually builds a guitar - not just bolting a neck onto a body. Still, more than I've bothered to attempt.