Short of adding a sunroof to the targa insert this it the most ridig you're going to get and still see skyline. I've seen a few different designs of these. Essentially you're turning the car into a T-Top model just with a far less obvious center bar. I saw one which was welded in place and the targa top fit over it.... and not much head roof was sacrificed. The owner used oval shaped steel to reduce it's depth.