I have always removed the governor set up from my previous hovercraft engines as it seems to be the normal thing to do within the hovercraft community. I don't fully understand how the governor works but I believe its to stop the engine over working itself. I can see this causing issues if you apply the power to tighten a turning circle, or trying to get over hump and the engine revs drop momentarily.
But for a twin engine craft would it be such a problem leaving the governor set up on the lift engine?