Thanks Nathan,
Great info.
I have been talking direct to ROTAX and they have been a great help, and he put more emphasis on making sure I kept the motor RPM around the 5300 mark. I guess, if as you say, the prop RPM falls with an increase in pitch, so does the motor RPM fight? Hence the need for more power (more throttle)
Roger (Rotax) has recommended 5300 RPM on motor, with 26-27 on the MP. And that's pretty much where she sat last flight, but had to back off, as it got too quick for the conditions I was flying in. It was not full pitch nor WOT, so not sure what she would actually do at full beans! LOL!