RE: Challenger 40 pusher IC .40
I have one of these from the original maker. This plane is not what I would call a fun plane to fly. You need to increase the throw of the elevator from, I think, 1/2 inch to around 1 1/2 inches to get it off the ground. To balance it I had to add a ton of weight to the nose and I did everything to keep the weight down and forward. I did fly it once and then turned it into one of my most beautiful hangar queens. I love the looks but it is not a floater ultralight. I spent $275, so for $109 you decide. I have to add if you do get it, put alot of washers under the bottom of the motor mount to angle it up. Throttle on pushes it into the ground, throttle off she pitches up hard, typical for a pusher mounted so high. I fly 3D with glow planes and felt very uncomfortable flying this plane, although I think the price I paid was a major part of the equation.
Jay