Well.......
When I saw this project post, I went for the old Alphasim's Dambuster Lanc. Oldie but a goodie, and low on polys. Ripped it to FSDS, started playing with it but then saw you guys were going to use Dave's Lanc, so left it.
Allen, with crew, turrets etc it is 12500 polys. Adding prop discs, ani's, and if you use the very simple UC that I built for my Avro Manchester AI model, it will not make it much more. The mdl (no LODs, but TBH you don't need them with such a simple model and so few ac needed), would be about 500Kb (it's 401Kb as is)
Alphasim were great sim modellers, if you look at the crew, which are positioned as in the Dambuster film, you'll see that they actually use Gibson's pic for the pilots face (along with shirt sleeves and tie as in the film), you also get Pierce Brosnans face (wow! ha ha) for the rest of the crew. The bomb aimer also has the Y sighting stick...just superb modelling.......oh why did you have to go, Alpha?
If plan 'A' was something else then ok, let me know if I can help etc.
Cheers
Shessi