sure wish I had the IFA prop.. I originally had 124 mph cruise but I needed to flatten the pitch to gain better climb. I prefer the climb out to be maximized during the phase 1 testing. I may or may not increase my pitch for better cruise. I am sitting at about 105mph currently but I usually sit around 5300 rpm rather than 5500. I do about 110 at 5500. Problem I have with 5500 is when the air is not smooth, I am constantly adjusting the throttle to keep from yellow lining the rpms. As I am still gaining confidence in my build, I hate seeing warning lights.