That looks really good. I like the idea of a raised platform for the tent. No flooding, insulated from lightening stikes, quite a bit more critter proof, and so on.
A couple questions...
(1) how does it mount to the roof? In stock locations?
(2) what is the load capacity of the Xterra's roof and how did you arrive at the figure?
(3) With the mounting points you have, how well is the load distributed?
Yes it mounts in stock location. It doesn't use all of the holes, but I just put bolts in the unused holes to plug them up.
I don't know the load capacity of the roof. The stock rack capacity is 150lbs. The BajaRack has 300 lbs capacity. I used my tent previously with the stock rack without any issues. The tent itself weighs about 150 lbs.
The distribution is good. There are four mounting points on each side.