In the late 70's I worked at an auto glass shop.. We used to just die when people would bring in there "pop top" sunroofs that were leaking.. Cut a hole in your roof expect the worse.. Another local glass shop was cutting out the tops of NEW trans ams and others installing t-tops... Still remember walking into that shop and an installer ( if you want to call him that) had his skill saw cutting off the roof of a brand new ( dealer still owned it) Trans am... Scary..