I'm new to this post and would like to know what prop was flown with all these engines. I been flying this plane for about one year and tried every prop to slow down the landings and give me some pull out of a hover. I finally bought a 17 x 4 and will try it with my saito 180. The lowest pitch prop i have used is a 8 and i have to much foward speed. Does anyone fly this plane with a saito 180 and if so what prop are you using.? Center of gravity is perfect. Does anyone fly this plane with COG set back?