I am working on a couple of Panteras at the same time. One is a driver and has all of its glass in place. The other is being assembled and only the door and vent windows are installed. The car without most of the glass is significantly easier to work on, particularly in the engine bay. Thus, it is starting to make sense to me that a removable rear window could be a long term benefit. I know it is not commonly done. Has anyone done this? If so, how does one go about it? I have had a bad experience with plexiglass in the vent windows (it was drilled for mirrors) and would prefer to continue with automotive glass. Please let me know if you have this setup.