It sounds like you really want this to come out right, but don't entirely trust the 3-view. If you're going to go to all the trouble of working up your own plans and building from scratch, then I suggest getting more sources for 3-views. What everyone who is experienced at doing this says is that 3-views can be shockingly different. So collect what you can and then do exactly what you just did...compare with photos (or visit a museum).

Bob Banka has lots of 3-views. I think it would be well worth getting a few. Got to the website, download the catalogue, and look for it under De Havillland and DHC (not DH). He's got at least half a dozen. http://www.bobsairdoc.com

If you go with some incidence in the wing, consider matching it in the stab. The full scale surely had an adjustable stab anyway, so pre-adjust it. Keep us in the loop. Nice project. I have an Airsail kit, and this discussion makes me think I should pick up some 3-views too.

Jim