I'm running the Rhino Rack Pioneer platform on the Rhino Rack Trackmount (replaces the rails). I can dig out the invoice and get the product numbers (if I can find it!) - Also have the Side mount rack for the MaxTrax with the shovel holders mounted to that rack.
The awning is the Darche 180 degree awning. It's fantastic.
Here are a couple of photos I have to hand.
The only catch with the Awning is that I need to put a vertical post on the rack so the rear strap clears the boot when it is open.
you can kind of see the post sticking up above the maxtrax.
With the 275/55r20s did you need a lift of some kind to run that size? Also, do you have any rubbing issues running the larger set? I was looking at 275s but was afraid of too much rubbing during city driving.