I'm getting a Moki 250 From Gotz V. soon. Can anyone tell me what to do to pull the best sound out of the engine? I love the 400 but too big for this 122" P47 and also too much more money not to mention the cost of a correct scale prop and hub. Anyway, some 250's sound great on you tube and others don't sound as good. Best I've heard is on a P47 owned by Franz Obenauf. What has to be done to give the engine the best pulse and throaty sound?