And a few more--The full size Cub belongs to Michael Waltrip, NASCAR driver. I got a bunch of detail from it. One other thing to consider if you do the J-3: it really isn't a great aerobat. The roll rate is slow because of the long wing, for one thing; you might consider whether you would want to clip the wings. It will still be a floater, but performance might be a bit crisper.