On those same lines, I recently purchaced a used DuraPlane trainer 40. Complete less the transmitter... for $25. I am an instructor at my club. My current student has a Hanger 9 Arrow and this last weekend it developed an aileron flutter. Common with the Arrow. I grounded his plane untill modification/repairs could be made. I pulled my Duraplane out of the car and put him up on it for the rest of the day. By no means does the Duraplane fly anywhere near as well as his Arrow but he still got to fly and actuall performed his first take off and landing with the DuraPlane. So, will these "flying bricks" work? Yes, by all means they will do the job.