I spent quite a bit of time trying to stop the physics from feeling too floaty, so I fiddled with the thrust and the weight of the vehicle a lot. In the end I increased gravity in Unity by 5x & that seemed to be much better but I didn't recalibrate the thrust after that. Perhaps I should tweak it again? Or maybe the map needs to be scaled up a little more so you have a little more room to maneuver? It definitely still needs a few tweaks.
But thanks man. There's definitely more to come. :D