I'v built a "fleet" of the Ducks--mostly from the AMA plans. I think the plan # is 730 or #731 they build easy and quick. I have had the great big foamboard duck and it was a hoot to fly. Almost took a 12 ga shotgun to get it to quit flying Flew great with a KB65 Tires/wheelburrow innertubes kept getting goathead stickers and going flat, so we just kept adding patches---added character!