What kind of gyro is used for the Volvo XC-90 anti-roll sensor? Is it a solid state unit like a fiber optic ring or laser unit, and where is it located? Just curious. (It's the ex RAF Avionic's tech in me that's nosey. I serviced and repaired gimbal supported mechanical gyros used in attitude indicators and autopilot platforms in another life and would have loved to replace those spinning orbs with devices that had amost no moving parts)