Update......
Bought the Baroud, have used it once for a 2 week trip to Portugal.
Seems to cost me a couple of mpg, I took it off on return but since then have bought a Skoda Estate for work which gives me 60mpg, so the Baroud is going back on permanently.
The tent sits on top of the cab, with a zip door rearward facing over the truckman top, so my plan is to mount two hard plastic cases on the truckman - this means I can keep my undies, socks etc within easy reach of the baroud, getting up and down the ladder can be a chore.
I also intend to fit a led strobe roofbar at the rear of the truckman, so if I am stopped at the roadside I am clearly visible - this can be an issue if the rear hatch door is dropped sown and I am stood at the rear - cars cant then see the rear lights.
I looked at various roofracks but have decided to use roofbars for the time being.
The Baroud.......wow, who knew camping could be so comfortable, like a hotel bed!
Sadly it had to go back to Baroud as the fibreglass was poorly made on the base, and its been gone 4 months but should be back soon I hope!