It was my post, here I had put roofbars on my coupe last summer, tried to put them back on and because the roofbar mounts had gone rusty, the bolt got stuck, and i ended up snapping the bolt in the mount. In hindsight i should have put loads of grease into the mouting holes when i took the roof bars off. However, my Citroen dealer stripped the roof mount, retapped them, and filled them with gunk, all for free. (Thule also sent me some replaement bolts, free). The roofbars bolt on so much easier now. And i have gotten some M6 bolts to put in the mounts when i remove the roofbars. Am a little concrened that they wont rust. But i cant find any plastic M6 bolts (yet - still hunting)