Simultaneous Joystick and RC control

Hey all. I have an XBox controller that I’d like to use to control a gimbal. Flight testing today gave us lots of problems with mission planning, so we’re looking to try some other routes. We were able to fly our bird with an RC controller just fine, but enabling joystick overrides RC control for flight. This obviously is the intended functionality, but for our purposes it would be ideal if we could fly with the RC transmitter and still use the Xbox controller to move the gimbal. Does anyone have any experience in modifying QGC to achieve this or similar functionality?