I've been carrying Rick's airplanes out to the runway all year and my subjective impressions are that the Syssa pulls harder on the runup and it shakes a lot more than the OS 160 in his Brio. Of course, a lot of my impression of vibration may come from the remaining fragments of the cowl flapping and shaking, there's not much of it left. It does seem to pull the heavy Evolution with authority.

Scott