Here go. Autohome Gobi and FrontRunner Slim Line II
Had the Autohome Columbus on Gobi stealth with two Yakima crossbars for about a month. Since thegobi crossbar do not level with the rack side rails, you can't really mount the RTT on the rails without modding and make the crossbar level with the rack side rails. I didn't do that.
I used the cross adapter and the yakima crossbars so the Autohome would sit on the yakima corssbars, but it still not quite ideal. Since Autohome shell constructed from fiberglass, it come with two mounting rail which is also acted as the load frame, the other part does flex when there is load on them. Ideal mounting would be to have the Autohome sit on a completely flat surface.
Since I want to be able to mount Rhinorack Batwing Awning and carry a table, I went with Frontrunner slimline II with extra wide platform and mounting accessories. To me this is ideal.