I used followed the Reimo instructions quite closely so it’s glued and screwed. Sikaflex primer and the adhesive grade of Sikaflex, apologies I forget the reference but can find it if anyone needs it.
The job is pretty easy but watch out for screws going through two layers of metal and getting the rail to bend into the curve of the roof. A helping hand is very useful. Wasn’t happy about drilling the holes but it is pretty well sealed and the materials are good quality.
