My brother had one a few years back. It flew great, and landed really smooth. He used a K&B 61 for power, so the 40 may be a little marginal since these are fairly heavy airplanes. Use epoxy and yellow glue to assemble the foam model and we put fiberglass strapping tape strips on the bottom of the wing to help stop flexing. You can cover it with LOW temp film if you're careful or latex paint with a sealer might be easier, and it covers up the grain in the foam a little. No room for retracts on this plane.