Very nice!! Love the nib, looks like a lot of work. Blank is beautiful as well. Will be perfectly honest...for some reason, the clear cap seems out of place. Maybe it is the visibility of the thread, not sure... Anyway, thought I'd mention it. The rest of the pen is excellent!
The clear cap irked me a bit at first. Then I looked more closely at the Nib. Beautiful Nib, great choice in letting the compliment of the celluloid and Nib show off together. Then I realized how well you executed the cap design, threads and polish. Great job!