That makes sense on the low pitch PE. I do have an 18-10 WW1 xoar prop. I guess one more thing I need to do is cut that xtra added cooling fin on the top of the cylinder. Not sure what that was for, but it is in the way of my mounting dimensions. Thanks for the info guys, gonna move forward with this as my powerplant. It should work fine in this plane. I do not need a ton of power. Just ease of use and reliability.