I LOVE CBUs, and that neck suits the size of your box very well. How does it sound with no sound hole, or have you cut one into the side?
I'm just finishing off a CBU with a 16" scale length. I don't know whether to call it a large Concert, or a small Tenor. I chose the scale to suit the neck blank, and the size of the box. There's no law saying they've GOT to be a standard size. Should be interesting deciding what strings/tuning to use.
As your photos are a preview, I look forward to seeing the finished uke.
John Colter.