RE: Fairings at the wing root
IR, I'm sure you'll learn something from the effort. It's an odd model to do that with as it's totally out of character for that sort of design but if you've already got it then go for it.
As for your Mustang I'm sorry to hear about the loss. It sounds like you may not have let it accelerate downward to restore flying speed before pulling up the nose or that perhaps you pulled up too hard and re-stalled the wing. Just guessing based on your description.....