A few weeks ago, I made a canard glider out of a Jetstream rubber band airplane. The Jetstream looks a lot like the old Hornet RB powered planes I flew in the mid and late 50's, except the Hornet had red lettering and a red plastic canopy and pilot. It's a good flier and can go over my house. My son picked up a couple for us at a discount junk-type store for 2 bucks each.
I took off the prop and landing gear, turned the wings around and swapped the rudder and canopy. It's extremely stable as a canard glider. Descends in a gentle 15° slope. I was going to AA power it, but I thought the AA stuff would be too much weight for it. Might also be hard to get the CG right. I'd like to do it as a pusher, but even if I got everything else figured out, I don't know if I could get the motors close enough together so the turns would be gentle. Maybe facing the props outward a little would help.