/// <summary>
        /// preferred method for pan/tilt control - sets it for both Nerf Guns
        /// </summary>
        /// <param name="panGunDegreesFromCenter">Positive values turn the turret to the right</param>
        /// <param name="tiltGunDegreesFromCenter">Positive values tilt the turret up</param>
        private void setPanTilt(double panGunDegreesFromCenter, double tiltGunDegreesFromCenter)
        {
            //panGunDegreesFromCenter = 16.56d;     // 16.56 degrees is 1/2 frame to the side, should hit the side of the alignment frame

            List <pololumaestro.ChannelValuePair> channelValues = new List <pololumaestro.ChannelValuePair>();

            // add commands to turn gun turrets:
            GunTurretLeft.GetPanTiltValues(panGunDegreesFromCenter, tiltGunDegreesFromCenter, channelValues);
            GunTurretRight.GetPanTiltValues(panGunDegreesFromCenter, tiltGunDegreesFromCenter, channelValues);

            ServoPositionSetUs(channelValues);
        }