Given the interest in my Beaufighter TT thread, perhaps a future group build theme could be TT aircraft. Even restricted to RAAF/RAN aircraft you have the Battle, Beaufighter, Firefly, Vampire, Lear Jet, Demon, Walrus, Vengeance, Mustang, Canberra, Meteor and even the Jindivik, so really something for all tastes.
Just a thought.
Tony