Going to give this one a whirl. Not sure about the CC, but it's a twin ring with good compression. Carb was missing so I'll have to use one I've got sitting around. Pretty light with a built-in mount. If it works out, I'll use it on a BUSA Eindecker. A .91 four-stroke will fly one well, so I should have enough power with this engine. The design requires much nose weight any way. I left both these 'ears' on so I could decide later where to place the ignition pickup.