Very intricate, Ed! I think I like the nib end
shape better (I like both ends really, but I'm 'Busy-Boy' so that's me). I think if the little 'fins' resolved into a solid round bead before tapering back into the barrel, it'd get rid of a little of the 'jaggedy' look, but I still like the depth of the cuts.
I really like the little off-center faux spiral treatment with the tiny finial on that end, too. I can't wait to see some of your 'rocket ship' desk pen designs that you're going to come up with!
Excellent work.
Overall, an extremely unique piece, and you've got my head roiling with designs that I'd love to try when I get set up with one of those, which will probably be a while, but for now I've got enough of my own 'roil-fodder' to keep me busy!