I decided one night that I would just make holes larger for the windscreen support and it worked.  I needed to get the car out of the garage to do it as I needed the door fully open and as I can't push it easily having adjusted the brakes I got the key and started it.  It span over for ages before catching and starting but once it did it was very civilised.  The frame fits well which is good but the bottom of the screen is not a uniform height from the shroud which is a worry; I will ponder on this later on.