If you want an Extra that is more suited to a 40-sized engine, you might want to look at the World Model Extra Sports 30 - with a hot 40 (or 46

) up front it cranks along. The finish on this ARF is superb with a fully glassed cowl and canopy. Having a short fuselage, it tends to be a bit squirelly on take-off, and will snap if you're a bit quick on the elevator, but apart from that it flies beautifully.
Russell.