While searching for Thule Xsporter Pro Off Road I discovered this thread...and thought I would add my experience.
The standard cross bars that the Xsporter is equipped with are much thicker than standard rack bars, and you will need to update/upgrade your RTT mounting hardware accordingly. For Yakima Skyrise owners (like myself) you will not be able to use the standard clamps that make the Skyrise easier to mount/remove...the jaws are about 1/4" too short to accommodate the Xsporter bars.
As others have noted, with the Tacoma DCSB, your front uprights will not be adjustable, as they come down and hit the incorporated fender well that meets the front of the truck bed. This was a major disappointment as one of the features I was hoping for was the ability to lower the tent while driving around town, although after reading some posts here in this thread that might have been easier said than done.
Nonetheless, I found this to be a very solid platform for our RTT, and have experienced zero rattles or shaken loose hardware after about 500 miles of standard city driving. The next big test will be a 6 day jaunt through Death Valley, where the "washboard test" will truly amplify any potential weak points. Photos will be posted after our trip the first week of November...
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I like the adaptation you made to fit Yakima Skyrise Medium to Thule Xsporter Pro. I have same tent/racks but on a Nissan Frontier. Can you share your parts list, sourcing, and estimated costs to convert the tent? Any installation tips will be helpful. Thanks for your idea!