I'm running the engine in the GSP Katana on gas/glow, and it's hopped up, but it sure flies the Katana great!! The engine fit completely under the cowl with only the carb velocity stack sticking through. I made a custom "Pitts" style muffler for it.

Info on "Gas/Glow" : http://www.rcuniverse.com/forum/m_12...page_20/tm.htm

I made some aluminum angle mounts to mount the Kioritz 23.6cc. They look heavy, but I weighed them and they are two ounces less that the original mount that came with the plane. You could also just use some spacers to mount the engine forward far enough. I did not have to add any weight whatsoever to get the c.g. spot on. The plane is a little bit of a pain to work on through the small access hatch in the bottom. Some guys cut the top off and make it into a hatch like an Extra, but I didn't.

Some people bash this plane because it is not really light enough for good 3D work, but that doesn't bother me as I don't fly 3D. It does all normal aerobatics super great. Snap rolls are incredible, good knife edge, etc., and this engine pulls the airplane vertical until I give up and hammer head out. For me, it's one of those few airplanes that you just feel at home and comfortable with from the first flight. All in all, I love this plane, and this plane/engine combo.

AV8TOR