I’ve just bought a 3DConnexion SpaceNavigator 3D mouse thing.
It’s proving to be really good fun to use. I’m going to add support for it to all my future 3D QC stuff via the HID patch, I think, and maybe go back and add support to some of the old ones too. The nice thing is, the HID patch fails gracefully, in as much as it doesn’t seem to generate any errors if the SpaceNavigator and its driver isn’t installed, but just works if it is, so I can add fairly transparent support for it to my QC compositions, hopefully.