Isn't that interesting... I happen to have an old Fox .45 ringed engine. It still has the old style unreliable carb on it. Runs like a bat out of heck at full throttle! (Of course the fact that I made my own muffler has somethin' to do with it's noise level and ability to scream!)
I don't use it much as it sits on top of a Dumas Swamp Buggy.

Very interesting indeed.