Tell you what... I'll give it a try with whatever prop he says and I'll report back my findings. My guess is that in the end, I will not like the outrunner at all and will switch it out for the C50 10XL that I have. I fly a 9 lb Yak with that motor on 8S with an APC 18x12 and it's wonderful. I imagine it will be great on this plane too. Still, I'm going to try the stock set up first before I go off making any changes. Who knows, maybe my flying preferences are simular to the designers.