I like your idea. The other thing I've done is do the same thing you described but using well-used fabric softener sheet instead of a second layer of fabric. Once you turn the 'leaf' inside out, you can actually press it for a finished leaf and then applique it without removing the softener sheet. It is so light that it does not bulk up your applique. I used this method when making a dresden plate. It worked like magic. I hope this doesn't sound confusing.