A lot of folks use CA to secure their parts. Especially on the larger kits, like Gents and Barons, etc. Just be very careful, Ca can permanently tarnish platings. Also, if closed up while still curing, the fumes from the CA can smoke or fog the platings. Always be sure your CA has cured completely before closing or sealing the pen up in any cases or boxes.
And remember, a tiny drop goes a long way.