I've seen that engine on a Reactor, and it ran very well. He was able to hover, and do everything a 3-D plane typically can. I bet it'd be fun in the 46 Do.
I'm so pleased with the way my recent Do went together, I took pics of the cowl up close. I'm very pleased with the way it turned out... except the trim of course..hehe I had a huge hole in my last cowl so I could slide it on after the exhaust was installed. This time I went for the "Clean" look.
Look how well I got the dang needle valve centered in the hole.
I flew it for the first time last weekend, and it went off without a hitch. The new O.S. 91 4 stroke ran perfectly. It pulls very hard with the 15x6, hovers a less than half throttle, and pulls out with authority(not a rocket, but plenty for me).