Dave, to me that's good throttling. Any production car, motorcycle, etc, exhibits good throttling. Good low end power is like Pe says. If I'm driving my car and can pass somebody on a two lane without dropping a gear or two, that's good low end power. Propeller loaded engines don't have the low RPM, WOT scenario, at least not for more than a fraction of a second.

Pe, I was wrong about blow down, probably closer to 20° like you said. We'll see how it goes. I have two crankcases.