Well, I saw this guy build an RC plane from foam board and off the shelf parts:
so i figured I shoudl probably give it a shot. it's all together, but I haven't had a good day to try to get it into the air yet. I have a couple different motor, battery, and prop combinations to test out as well...
UPDATE: well, it flies! And pretty well too. Some center-of-gravity tweaking still to do, but 5 flights, 3 crashes, and a lot of easy Popsicle-stick-and-hot-glue repairs later, I'm quite pleased with the performance. Have to get some in-flight video now.