Hot glue is 'DA BOMB for lens attachments in Trooper helmets,and Fett helmets.Epoxy takes too long to dry,.....even the 5 min. set type.
Although you could "spot weld" a "T" visor in with hot glue,and then use 5 min. epoxy for the rest I suppose.The only problem is the possibility of it running before it set.
I definitely plan on doing the hot glue method with my Fett helmets as I've done on my Trooper lens'.It's as rock solid as any epoxy once you've got a good beaded amount on your visor.