I’ll have to get some better pics, but I managed to get it installed by using the Thule towers themselves. Now that it actually works, I’ll modify the mounting by getting some wedge spacers made. Would be super easy, just needed to have the thing in place to use and to see how it mounts, now I can make or order up permanent angles spacers.
The material is excellent. Design seems good. And I am glad I did not buy a cheap-o version because the metal bits are just robust enough, but you wouldn’t want anything thinner.