For what it's worth, keep in mind the costs Brooke is taking on for these things even with donations. The more complicated the design with shape and colors, the pricier it's probably going to get. Maybe he'll say different, but I know when thinking of having a patch done in a past scenario for my Group, the more colors and shape the more it cost.
The other thing I'd suggest, and it's just my opinion and worth nothing more then that, is to think of a pilot's A2 or B10 jacket when designing them. Would it look appropriate either as a shoulder patch or on the front of a pilot's jacket?
Again, just my opinion, but I think worth taking into consideration