Glad to see some progress on this one ....
I had the chance to see another 22 up close at the Alliance Airshow in Fort Worth last weekend. Wanted to get some good, close pics, but it was really busy and people were all over the place. As soon as I got set up to take a picture, people would walk right up, look at me, and then stand right in front of me ...
As far as "how to" on the flaps ... I've done something similar on a different project. Cut the flaps out, sanded the insides of the flaps so that a styrene (or brass/ alum rod) would fit. That gave me the curved edge I was looking for. Then putty and sand the seams after that.
The 22 that I saw this past weekend had the flaps all the way extended. Might be a small challenge, but not impossible.
Looking forward to more progress. Great work so far.....