Great vid Dan and nice landed..I should practice more mine!

I would ask if some of you guys have the Os ft160 Gemini? I have this engine on my cub, I use fuel with 20 oil 20 nitro, actually with a 18x8 prop but icant get more than 7500 from the engine.. I think is too low!I would try a 17x8.. Any idea?
Sorry for my bad English..
David