Yes, through Joystick Gremlin/vJoy I have setup a secondary switch. Right now its just for knobs but it would work with buttons as well. Now I have 10 knobs instead of 5.
Even after the “heading bug” is fixed I’m still going to use Joystick Gremlin/vJoy because of the flexibility it gives me. Some other buttons I have setup with two different functions depending on if its a short/long press.