lots of super stunts around here, both sizes, but more of the smaller one (not really small though, still a pretty large plane). I would echo the comment that they are the best kept secret around the arf world. WONDERFULL flyers. The 40's need a bit of strengthening in the wing center section though for most people. Several have folded. Of course,..as a testimonial to the design,..everyone that's folded a wing, buys another one, reinforces the wing, and continues to fly them.