Made a clamp for my Toyota Tacoma's Thule Roof rack bars. It can be slid on and then clamped down. I attached a file which can be edited to add whatever you need to attach to your bars. I also attached a version which I made that is compatible with the windmill design linked here https://www.printables.com/model/969753-windmill-100-printable-no-support-no-bearings-low

Thank you :)