Hi Michael.
This is a full custom or "kitless" pen. The resin is Alumilite poured by Jonathon Brooks. The rest is all turned and hand threaded with tap and die by me.
Fountain pens are no different to turn than any other pen if you look at it from a kit perspective. There is a little learning curve for how to ink and tune the pen, but there is so much good information out there on that and once you have one in your hands to tweak on it really does become no different than turning any other type of pen. Nothing to be afraid of and I say just do it
An Atrax or similar kit is a great place to start.