if I had a digital camera I'd send you a photo of this setup. The dowel ends about an inch shot of the pot. A brass plate is affixed to the bottom of the dowel and a brass flange to the pot. Though the flange goes a machine screw which touched the plate on the dowel, thus allowing   the dowel to be adjusted toward or away from the head. This neck has an ebony fingerboard , which the other didn't, but it has already been repaired at least once; there are visible cracks as it nears the pot. It's playable, though. I am searching for a local luthier who will take on the job.