Has anyone had any problems with the roof leaking? I bought an Astra Twin top 2 months ago (car was 5 months old at the time). Since I've had the car it has been in the garage for a month while Vauxhall try and fix the leak. So far I've had new sills, metal bits bonded together etc etc. They are now replacing the rear panels! I'm hoping that mine is a one-off, but would be interested in hearing from anyone else who is experiencing problems