I had a pair of Yakima ForkLift racks on my '08 OBXT, and they fit fine on the factory crossbars. I moved the front crossbar so that it fastened inside the slot in the front rail mount, and there was no problem with clearance for the lift gate. The bike do tilt out a little (maybe 5˚) but this causes no problems. There is some flex in the factory crossbar where the aero portion joins the clamp, but I've never been concerned with using it with the two bikes up there.
Since then, I've added the heavy duty cargo basket with 18" extension, and now have the ForkLift racks mounted on the crossbar of the basket. I just carry around a milk crate to stand on to reach. (I'm 5'8")
Here's the current iteration:
More photos
HERE
Hope that helps,
Steve