BME recommends using a 20X8 or 20X10 wooden prop. Just talked to them today in fact about this information. The reason for the wooden prop is if there is a prop strike, you are less likely to bend the crank with a wood vs. carbon. Let me know how your PW 300 flies. I have one in the box and just got a 44 to put on mine as well. Did you buy yours new or used, and how much did it cost you? Please email me back directly at [email protected]. Thanks. BTW, they recommend the Pro Zinger or Menz props.