Other than the obvious adjustment screw on the meter, I don't know. But I would ask Paul G. when he gets back from France. Rob Duckering or Bryan Carr may also have one of those and have the instructions, being both stunt fliers and boat racers. Mike Hazel would be another possibility.
I tried Googling for the instructions, without much results. Posting on RCUniverse might be a good idea...also on the speed, racing and combat forums here.
Steve