Any of the Sig Success Series kits. I built 2. One Sukhoi and one ME 109. I built the 109 for a magazine review. The fuse was plywood and weighed a ton. For the review I recut the fuse sides out of balsa to fix the problem. Lost the airplane on the first flight. After doing some measuring I figured the tail was too small so you couldn't slow it up. The magazine refused to publish the review. Then I won the Sukhoi at a contest. That kit was no better. Threw all the plywood away and replaced it with contest grade balsa. Made the tail 30% bigger. The airplane flew great for a lot of flights. Lost it to a bad receiver battery. Was thrilled when Sig stopped making those kits.