[tuanle16]

od...that looks like a "cut" to me. mine is worn in the same area, but completely different looking. not sharp like yours.

and to answer your question about glass window...you can not replace the plastic with glass unless you change out the top. i am thinking of doing the same thing.

perhaps, you got a good thing going though. if it was cut, then you can claim vandalism from your insurance company and have them replace the top for you.