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Something else to consider. Did you use a large klunk and tubing throughout the fuel feed plumbing? This is an important requirement. The engine burns the fuel!

No, I did not, I used standard fuel tubing, I think it's about 1/8" ID, and a reg. size Klunk that came with the 20 oz. Tank . She's not running lean and display's a rather heavy smoke trail, but that too could be because of the extra oil I add to my fuel.
I have yet to deadstick the Cap because of a empty tank and flight times are about 10 -12 min. I'm open to more suggestions???