I've been playing with the "edit plane" feature with the Easy* model in my Aerofly Sim. It is interesting to be able to change the diheadrel, motor power, etc and watch the effects. The Easy* platform is really a well designed form. It can be tweaked so many ways and still maintains its flyability. I've really taken it to the extreme at times (crazy wing geometry, body design) until it would only fly with gobs of power and you could only point it not fly it...LOL Sims are amazing tools to teach more than the hand eye co-ordination necessary to fly a plane.