On the videos, check out the stationary fastener pattern between the rotors. I think they solved that problem on RAIDER.
That is the same as the X2. It was the weathervane apparatus (of which they patented 3 implementations on their patent) which proved troublesome.
Congratulations to the Raider team! Very cool! The video looked great.
Bryan Cotton
Sikorsky/X2 Alumni
So you have seen the video! Hopefully they didnt make the same miscalculation with the control gains as the X2 maiden (I am sure you remember that having been so involved in the FBW). Bredenbeck had the thing dancing on him that afternoon.
edit
Here is the video, pretty stable this time