I have a 30% yak had a 25% extra and have a 68inch wing edge. I would go with the yak for 3d especially slow flying stuff. The extra is too heavy for 3d and the edge is a very true flying plane. By that I mean it goes in a straight line wherever you point it. It's also very snappy, will stall easily. The yak has a huge wing area and a big cowl to swallow the air. I love my yak, go with the yak for 3d flight.