I did this when I fixed my sunroof issues. I also dropped the headliner and added two whole tubes of calking to fix all the leaks I had.

__________________
2006 Audi A3 2.0t DSG apr stage 2
2002 BMW X5 4.4
1997 BMW 328ic sport. moreagrun metallic
1989 BMW 325is with / M50b25nv swap