Jim, about the deck caps. If the naked hull is to be gunwaled in vinyl the plastic deck plates need to match the cross section of the one piece inwale and outwale gunwale box, as well as the angle of the vee stems, at least for a decent pop rivet fit.
The Nexus has a little bit of lay out in the stem, so the perfectly fitted vinyl gunwale deck plate would also have a slightly undercut lip at the tip.
I have three sets of long unused vinyl deck plates in the shop and would be happy to send you a set if they would fit. Lets measure to see what I have.
A near pristine set of black vinyl Old Town deck plates with a molded carry handle, slightly undercut at the stem. I am not sure how to size them for fit in description. Draw an Isosceles triangle, 17.5 inches along the equal sides, 9.5 hull width inches long at the base at hull width
A set of moderately scraped and dirtied black vinyl deck plates, not Old Towns, but with the identical OT gunwale channel. Straight tipped, no undercut, no layout. 20 inches long on the equal sides, 11 hull width inches long at the base.
A set incredibly bulbous stemmed brown vinyl Mohawks, slightly undercut. The gunwale channel is a bit more square than the other two, but very close in cross section. The tips of those deck plates are very wide, but FWIW, 18 inches along the side and 11 at the base.
Let me know, I would be happy to send you a tracing of the hull stem sheerline vee for any of those deck plates that might fit.