Just to clarify on the question of the ladders. Because
the ladder mounts to the top of the rear door, and because there is a very
slight curve to the top of the door, for the sake of perfect accuracy it is best
to manufacture the ladders for their intended position. But having said that, my
own ladder is symetrical. ie it is made to be mounted in the centre. But I use
it on the RHS and it fits equally well on the LHS. There is obviously a small
gap between the top of the door and the one ladder mounting because of this, but
no more than can be easily corrected by using a piece of bicycle inner tube, or
something similar, to take up this space.
To summarise; if you want the ladder to fit precisely,
and you know what side you will mount it, then specify that in your order.
However if you are uncertain, or there is a possibility that you will need to
change the location, then I think you will be fine with the centre fit ladder,
which you can mount on either side.
Thanks
Ian