Currently over propped with a 28 x 10 and a few engine tweaks required but it flies superb, even at full flap deployment, rock steady with no ballooning. MR Ziroli did tell me a few years ago its one of his best flying models, and hes spot on, Zdz needs tweaking and will now sort a three blader prop and cut the spinner..... well worth the build and highly recommended..
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