Just now tripped across this thread. I have built three of these with brushless motors. The first was as per plans with a Cox Dragonfly on it. I built this when the plans first came out. It stayed in my attic for a decade waiting for me to learn how to fly. Kept trying to teach my self with various 'trainer planes'. I finally pulled the engine off and sold it at auction, puta cheap brushless motor on it and with the help of an experienced flyer I learned to fly. Just as everyone else has said, it flies great. With a small patch of concrete you can get alot of practice at take-offs and landings. Wore this one out last yaer (including the motor). Over the winter I built two more, planning on another for some kids down the street. A great trainer, and it's a LOW wing! Many thanks to Randy Randolph for a great design. I'll be looking for more of his designs.
I'll attempt to post pictures of one of mine in another post.