I am thinking of building a jazz neck using red oak for the neck and cocabola for the fb.It is to be fretless. I chose these woods simply because I already have them. Can anyone think of any reason that this combination woudn't be satisfactory? Another issue is that the neck that Im copying the dimensions from has a 13/16" thick neck and the oak stock that I have is only 3/4". I plan to make up the difference in thickness by making the fb an extra 1/16" thicker to make the total thickness the same as the neck that I'm copying. An alternative might be a 1/16" holly "shim" between the neck and fb to make up the difference in thickness. I dont plan to use an adjustable T.R. I plan to use two carbon fiber splines to provide stiffness and just plane the relief into the F.B. Anyone see any probs with this plan? I am just a bit concerned about the weight of the finished neck. Thoughts? I plan to use the neck in an H27 vintage Harmony hollow body. This is just a shot in the dark but do any of you guys know of a source for vintage parts that might have a neck for such an instrument? Fretted, of course. Thanks in advance for any good advice.