I just maiden my Fliton Votec 351 with OS56 alpha 4stroke today. I notice the plane has the shimmies while flying. My old 25size 2stroke trainer plane never had the shakes, so Im kinda disappointed with this new one. Fliton specifies .56 to .63 4stroke engines for the votec. And Im using the recommended engine. However Im using 13x6 prop rather than their recommended 12x6 prop by Fliton. Could that be the problem? But the OS56 manual specifies 13x6 or 12x6-8 prop is okay for this engine. I also notice while on the ground at idle speed, the plane vibrates ALOT, but throttle up the vibration goes away. Could it be 4strokes all vibrate too much? My friend (veteran pilot) says its the wind, but im not too sure of that. Comments appreciated. Here's the video of my maiden flight, but you cant see the shimmies on this video (mainly bcos the camera shake is far worse):

http://www.youtube.com/watch?v=H-8vuFOwqek