I have a 3-wheeler hauck thingy, but it is a nightmare to actually steer on very rough ground (It's about 1/2 mile to the nearest bit of tarmac here!) .
And it has blown over many times in the strong winds here.
I really want a 4-wheel one, but with the air wheels - I just don't know how to find the damn things!!
Pramophiles, I need you!!!