Treven-

I bought one of these cheap off Ebay too. Seems to be a strong runner, havn't put it in a model yet though. You mention an exhaust collector ring - is that some form of a muffler? Where does one find something like that? I know without any muffler it would exceed the noise regs of the club I belong to. I would be interested in trying your carb mod too. Do you have pictures?

Chris