Nice Pen, Jason,
Great choice of Koa, A Beautiful Timber.
I think I would have preferred to have the Blank and Cap Straight, rather than Convex. But that is just a matter of taste.
As mentioned there is some undercut on the Cap at the Centre band.
Your CA Finish is pretty good, though there are a couple of problems near the Postable end cap, also there may be one near the centre, or it might be in the photograph.
An Excellent Early Fountain Pen, and use of CA as a Finish.
Brian.