I've removed the headlining already and there's two rust holes at the back of the sunroof tray. There's a bit of rust bubbling behind the sunroof on the outside as well so i'm expecting the worst. Every time I wind the sunroof back and forth it brings forward more rust and makes a horrible noise.

As for removing the glass first, that was my original intention as it would be the logical thing to do. Would I be right in thinking it's the 3 screws that hold it to the sliding metal frame, then 3 fasteners on each side on the tilting mechanism. Even with the sunroof tilted all the way forward I can't get to the forward 2 fasteners. Is there another easier way?