There seem to be a few people trying to pick up a Zenith 3.7 lately. It is a beautiful design from the past and a wonderful machine to fly with the newer radios. My DX18 with older digital servos makes this sailplane fly better than ever. if you have an older design you might want to try it again with a newer radio. For those lucky enough to still have a Zenith 3.7 take it back out again and have some fun with it. Nothing makes more noise in full reflex or on landing than that 8.5% HQ section with 3% camber. Your friends will all duck for cover when you dive across the field