FWIW:
Our club has an event they call the Quadrathon. Basically 4 events. Old time stunt pattern. Speed. Scale (appearance), and Spot landing. So, all this needs to be done with a WWII type profile and a stock Fox .35. I built my Stuka from a modified John Lowery kit and tilted the engine up to about 10:00. Object here was to eliminate the "Fox Burp" in the stunt portion. It worked! Tank is a chicken hopper jacked up the "standard" 1/4 inch higher than the NVA.
Ward