Thanks for the help, guys. I'm starting to get a better grip on using the Rotol prop. Now to start learning the DH5-20.

Keep RPM within the ranges suggested in flea's document and make sure your boost isn't too high. If you balance these with both the propeller and throttle you should be right.

If your spit is getting hot and you have some altitude it is a good idea to nose down gently to pick up speed and open radiator. A lot of people throttle back instead but the spit needs high airflow (speed) to cool down.

I understand that the DH5-20 is just a two-pitch prop but I haven't quite worked out how to use it properly. I do the normal start-up with the pitch set fine and wait for the temps to get into the right range, but when I throttle up for take off, she starts to run really rough. If I throttle back it smooths out but then I don't have enough thrust for takeoff.
So I'm not quite clear on proper procedures using the DH5-20.
Edit; After some testing, I find that although the real Hurricane only had two mixture settings, full rich and full lean (weak), since I have my mixture on a slider I can lean it just a little and it cures the rough running on take-off. I still need to keep the radiator open all the time or she overheats real fast, even at cruise settings.