The strip of rubber across the top of the windshield on my
'94 Pathfinder has crimped up and probably needs to be
replaced. Two questions:

1) Is this a part I can easily install myself, or should I have
a glass shop do it?

2) It's hard to tell if a small (2 in.) section at one end of the
gasket has broken off--should there be an L-shaped
metal corner piece that covers this? I looked at another
old Pathfinder and only saw the L-shaped corners at the
bottom of the windshield, not the top.