I have not one, but two dowel stick banjos that I'm looking into having five string conversions. In both cases I love the sound of the banjo, but the neck is not functional and I want to play five string style anyway. Is there anyone out there doing this at all?
Zachary Hoyt has built necks of different scale lengths for me, and fitted them to existing pots. He is, imho, an excellent craftsperson, one of the easiest folk to work with you can imagine, and accessible and responsive while working on your banjo(s).