I dont know if this is anectodal or not, but I had my flight control axis bound through spad.next, it's easy for me to control many airframe profiles this way, I too experienced the roll instability described here, feels like your trying to balance on a ball. After some other issues I decided to bind the axis controls inside the sim, and not through spad.next, I found that the control improved significantly, although still not as good as it should be. Has nyone else tried that?