RE: PROPING ENGINES TO RUN IN THERE POWER BAND
Most of the time, the manufacture's info just gives suggested range and recommended props. Usually this data is way off and it doesn't take into account the type of aircraft or how it will be flown. That's why this forum "tachometer Readings" was formed, much more detailed info here, just find your engine.
Engines don't always unload(gain RPM in flight), it depends on prop, engine and plane.
These questions are best to asked in the "Glow engines" forum.