Just maidened my Ultra Stick this weekend. Oh Man!! I love this plane!! I put an O.S. 70 in it and worked out all the weight/CG issues. It flies like a dream. Lots of power. I have a 13 X6 prop on it and not sure if this is the size that will work best on it. I had started out with a 12 X 8 but wanted to slow it down some. A 14" seems like it would be too tall and hit the grass. Any suggestions?