1) Just for the kicks and giggles of it, my next build is going to use N type connectors. You may wish to try this yourself. They’re a little more sturdy. The chassis mounts will install the same way, and male N connectors will be needed on the limb center elements. Out at the stinger connections I recommend staying with the PL259s and UHF barrel connectors for simplicity.
2) Richard (at MTC Radio) has some of those hurky-looking wire antenna end grips for tying off wire antenna ends. They’re big, silver and ugly, but they work. I’ll be switching all my Bazooka ends over to those doohickies. They are dirt simple and generally tougher than a bag of hammers. Be sure to pinch the wire bails snug before you hang ’em.
(If you know what the dang things are actually called, please post it below.)