On a neck graft, do you try to duplicate the original neck profile? or replace it with a different shape. It seems to me, the riskiest part of doing a neck graft is the final shaping of the profile.
You must have a lot of faith in your Luthiers.
By the way, I found this article on your friend who is working on the bass.
http://query.nytimes.com/gst/fullpag...57C0A961958260