well instead of just gluing a gyro onto it maybe do a small gyrologic circuit board type thing

@Tomatsu Thank you, that's a really good idea! If you want, i can give you some explanation on how it works. I built it as small as possible, but that also means that it's quite hard to figure out the way it works.
I'd love to see this in combination with a gyro! Maybe they can be coupled, so that you can control the hovercraft by using pitch, roll and yaw.

Really smart! Love it. With one of my gyroscopes I could let this thing automatically go into free fly mode when it would leave the 17 blocks ground range.