My '95 teg sunroof, moonroof, whatever, is stuck. almost closes but not quite. I know the stopper on the passenger side railing is gone, the glass has slid up to high. I've taken it apart and done the emergency crank - didn't help. So the dealership says I need to completely take the headliner out, and replace the railings. anybody done this? I'm good at DIY - just need a pointer here, new territory for me. thanks