Saito 120, 150, 180? All the same physical size except a 1mm difference in height between each step up.

YS 120, 140DZ? Word is, YS engines have the most power of any engine in the same size class.

I am putting a Saito 120 in a Vectorflight Edge 540 66" WS at 300' elevation. VF specs claim the plane should come out to 8-9lbs. I am hoping it will have enough power to hover.