I am currently building my 2nd 102 inch bud nosen trainer-the plans call for 60 size engine which is too small-I am also adding flaps to it and making it a tail dragger. The big question ? my choices in a powerplant- a os 91 fx or a os120 surpass-any ideas and thoughts would be appreciated-thanks[img]i/expressions/face-icon-small-happy.gif[/img]