We'll know soon enough. They still need to keep that glass ceiling over the engine compartment. One of the scenarios where a glass ceiling is wanted and prayed for.It breaks down into the size of the Targa top it seems so I am thinking it takes the spot behind the cockpit where the glass is for the sound abd there is a sound and heat wall there as well...if you look at some of the pics GM has up you can see the double lines in the body and roof area from what I can see in some of the pictures.