Looks pretty great!
A handy method my boyfriend used to keep his Gambit headpiece attached was fashion tape. It's supposed to hold up dress straps and the like, and is sold in lots of convenience stores and makeup-type stores. It held pretty well. Only had to be changed once during the day, and the small strips were very easy to keep in a jacket pocket as backup.
Hepzibah (with the Corsair), Scarlet Witch (with Quicksilver), Dagger (with Cloak, 2013 Ultimate editions), Stahma Tarr, Pyrrha Nikos
Chosen, In Planning:
Red (with Subject Unknown), Tempus, Azir (with sand soldier[s])