Crump, if you look at the 2nd photo in on the bottom row you will see an aluminium channel on the bottom of the tent floor, this allows you to slide the mounting bolts along it to clamp on roof bars at any distance apart, however, I had a tjm rack that I cut the sides off to allow the tent to fold out, and I found that it's really hard yakka to get the zip that holds the cover on as it is around the bottom of the tent, and was too close to the rack to do easily. I changed over to roofbars and it's SOOOO much easier to pack.
I have the tent on a 04 defender and don't need the ladder extension (we bought one anyway, but have never used it.
It could be useful if you opened the tent towards a downhill slope.
I would recomend you get the additional annex(?) thingy, as it will give SWMBO somwhere to dress properly, spread out clothes etc.
BTW, I have a friend in WA got one of these tents for $350!!!
Can't go wrong at that!
Fraser

