mounting the laptop;
I tried initially to fix it onto the parcel shelf, but the leverage effect was a concern, and off road the vibration excessive.
So I designed and made up a mount onto the passenger seat - car is in the garage so I will provide a pic in due course.
I fixed a portable TV bracket on to a piece of board, say 12" wide and say 24" high, so that the bottom of the bracket ( usually a cover over the rotational axel of the bracket) is level with the bottom of the board.
The pivot-tv bracket bottom sits on the passenger seat swab(base), giving a cushioning effect, and the board the bracket's wall plate is fixed to is secured to the seat back by straps around the head restraint. I also loop a bungee cord over the arm of the pivot, secured to the floor at the two front corners of the seat.
The laptop is secured to the pivot plate with a webbing strap.
This has worked for me, and although I can't take a passenger with me I am in no doubt where I am/have been/am going ( unlike with a navigator!!!), and he now has to come out in his Land Rover with me.
The laptop's screen map display is big enough to read at a glance - but you wouldn't try to use it whilst moving anyway would you!!!
The laptop coupled with CB make good companions on a trip - just dont try to watch porn whist you're driving!