The Red Box Zero and Bearcat were the best in that series of kits. The Corsair was OK also. The P-40, Mustang and P-47 were designed by Dave Platt in the early 70s. I had a Mustang for my third airplane in 1972 and it flew great. I flew it a couple of years and sold it to a friend and he finally wore it out. Again when I built that one I got rid of most of the kit wood an it came out light. Had a Veco .61 flaps and Goldberg retracts and covered with Monokote. I think the Zero would still be a great kit today with only minor modification. I don't know why Top Flite doesn't bring it back. Don