I must admit I have been toying with the idea of welding in a couple of bits of 25mm box section at either side within the bounds of the scuttle to allow the possible fitment of a screen with 19mm box section ends that happen to fit very neatly into 25mm section so I am thinking of welding the 25mm section in now so I can work on a windscreen in retrospect and just have a couple of grommets to hide the holes during nice weather.......should not be too difficult to fabricate with something like a nissan micra rear windscreen ( I would like some curvature as I think flat glass looks naff)