Recently I got rain leak at the inside top corner of driver side of my D2. By pouring water to the sunroof tray, I made sure drain tubes are clear and also sealed between roof and rail nearby using RTV. I found there is a big gap at the junction between the gutter and the top corner of the driver side of the windscreen, and a small gap at one of passenger side. I am not sure how they are developed, it seems nothing is lost or damaged there. Is this a leak source? how can I fix the gap?, see attached pics.