Current prop is the Evolution 13x6. It peaks to 10570 and is tuned to 10300. 450 ele. 58F It is so much better with the Macs in my opinion. I will try an APC 13x6 when I can make a locater bushing for it . I weighed the Evo 13x6 prop against the APC and was very surprised that the APC is about 5 grams lighter. The engine runs like a Swiss watch and only showed the nose-down stall when I intentionally tried that yesterday. I might have to look at putting a video ( first ever for me) up so you all can see how my set up is performing. I noticed Flyingwalendas the other day.