One area that almost all of the kits on the market have wrong is the position of the main gear. It is very close to the leading edge and is angled forward when down. Also when retracted the wheel is again close to the leading edge. Sierra Precision is making gear with the strut cantalievered of the front of the mounts so you can get it in a more scale position. Its tough with the thin laminar wing section but it can be done. I think Jim Meisters Master scale kit that he did in the early 80s is probably one of the most accurate kits ever done although with a 74" ws was a little on the small side. I think that one done in the 90" ws range would be a real winner. Don