I will be driving some distance to a tree farm with kids, and don't want to have to take the ICE minivan. Not worried about tying tree on pano roof because there's no paint to scratch. But would rather not have to do the twine through the windows approach to tie it on. The thought occurred to me to pick up eye bolts matching the thread size of the roof rack mounting points. Has anyone tried this, or have documentation of the size and threading? Or have experience with these on a Mercedes, because like some of the interior controls I believe they are sourced from MB? Quick responses appreciated - hoping to go today if the weather is ok. Thanks.