<br /><br /><br /><br /><br />absolutely right...there are 2 ways to get perfect synchronization...directly encode in model file (like in new POSKY 747-800) or encode in fx file (like in original Arjan Scheffel B737-800); in later case flexing wings will cause visible problems. There are some "FS limitation" also, you might noticed that in the window view at later part of the video, effect is more or less synchronized !!