I've been thinking a bit more about a Wings at War project for the Winter War, which can also double up for Bag the Hun and the Blue Swastika Rampant supplement, using my existing 1/600th scale Soviet aircraft as a starting point. The bases and terrain can be re-purposed from my MiG Alley set up, which mean that the only thing I'd need to sort out would be the Finnish aircraft and some new templates for forest areas and lakes. I'm not sure these would affect gameplay but they would make my snow cloth look more Finnish!
I'm looking to add a few more Soviet aircraft in Winter War camouflage and markings, with some DB-3's being one missing element for example, then add the Finnish aircraft for the opposition. These would include a selection of fighter types including Fokker DXXI's, Brewster Buffaloes, Fiat G50's, MS-406 and possibly Gloster Gladiators, with a handful of light bomber aircraft including Blenheim Mk I's. I also need to work out how to model skis, although I may well ask Paul at Tumbling Dice if he can come up with something.
When I looked at this before it was clear that the options for the Finns looked really varied but in reality, most of the air fighting during the Winter War involved a small handful of fighter types depending on the exact location and date. I'll have to dig out my notes to double check and do some more background reading to get a grip on what flew where and when, so that I can develop the rules and also write some additional new scenarios for Bag the Hun to expand on the two in Blue Swastika Rampant.