Peter, can't help with your issue I'm afraid (far too modern!) but may have come across a possible solution to my problem.
When I had the doors off I replaced the hinge pins which were a little slack. This means the door section furthest from the hinges will be higher and therefore the leading edge of the side screen is closer to the windscreen frame (i.e the door "drop" has been removed). I recon that if i put a small spacer under the top hinge (or let in the bottom hinge) it will bring the leading edge of the side screen away from the windscreen frame. Looking at the geometry a 1mm spacer will give about 3mm movement at the top of the side screen. Obviously it will affect the fit against the hood and the door catch will probably need adjusting. But easy enough to test out.
