RE: General question about prop pitch and diameter.
The best way to determine whether the props will work, is to install the prop, put a Watt meter in between the battery and speed control, and advance throttle making sure that you are not exceeding the lowest rated component. If you don't have an Watt meter, keep a close eye on how hot the motor, speed control, and battery. Make sure they are staying cool. When you switch to the larger diameter, it may pull too many amps, and fry any one of the components.
Doug