Absolutely, 4 strokes vibrate more than 2, at least thats been my experience. I have 2 1.20AX, one in a Velox and one NIB for the Fusion. The engine in the Velox was in X100 for a while, great combo there, at 8.25 lbs, the 1.20 could hover all day. In the 9 lb. Velox, it still hovers & enough pull out to get out of trouble, not rocket thrust, but just enough. If the Fusion comes out @ 7.anything, it will be just awesome!