Just in case it happen for other: This morning I finally had several good and smooth flights in VR. My main issue was fps and wobbling too much. The problem was, in my case, the Virtual Deskstop settings for SSW set to “Automatic”. Setting it to ON or OFF (as you may prefer) fixed all stutters and wobbling, and I had smooth fly after. I also set “Streaming fps” to 80fps (so 40 real = 80 with SpaceWarp) to save some GPU usage and increase VR settings.