:-) This as gone quite, so this might be a good time to start fleshing out the details.
What about:
3 levels ie:
a) For the novice, those with very few kits under their belts, or those that are building out of their normal sphere, for the first time.
b) For the intermediate builder, those with plenty of experience, or building within the "comfort zone". Possibly those that normally build OOB but are detailing.
c) For the skilled builder, those with more experience, or those that regularly detail or super detail.
The theme would be The Battle for Brittain. Any model can be built, in any scale but it must:
a) Be from the period May to December 1940 and have a link with either the Luftwaffe or the RAF.
b) It must show something to do with either the attack on Britain, or the defence of Britain. It must have a military theme. (civilians can be included, as long as the overall picture is military).
I am also thinking that the subject should be on a base. Not necessarily a diorama but a desplay base. The sort you see at most competitions. As simple or as complicated as you like. Size to suit.
Time scale 4-6 months?
This has not been fully thought out, so feel free to pic holes in it. remember the idea is to get as many involved as possible, particularly the new members. :-)
Mal
