Mike, did you fly it yet? The 19x11 was my early break-in prop. Then an 18x10 3 blader from Mejlik. I expected more quietness from the 3 blader but that was not the case. Too many Rs; not enough load. After a few flights I moved straight to the 20x10.5 PN and broke the engine fully on that prop. I've used the same prop ever since and the 33 just loves it. Its a great combo.

I've played with the 20.5x10 PN also and the engine likes that prop too. Very good power and great brakes in cooler weather. It is an increased load tho and in very hot conditions performance isn't as good as with the 20x10.5 up front. I've settled on the 20x10.5 for this engine for all around performance in all conditions.

Now IF I ever get off my duff and make a mold of it, I should remove half the weight casting it in carbon.