Made the screen (Lolocost frame) and fitted the wiper mechanism (BMC Mini system.) Problem is that as the sides of the screen frame are at quite an angle the wiper blade on the drivers side sweeps right off the screen frame. PILLOCK!!! Have tried to bend the arms etc but to no avail. SO, make a new screen (NO) reposition the wiper box by drilling another hole in the scuttle top (Possible but leaves a nasty hole to cover) or replace the existing gear wheel which is 110 degrees with a 90 degree gear wheel which I believe is available. Does anyone have a spare they would sell me or where do I get one. Message to self, measure twice, cut once!!! I should know as I teach it to students!!!

Looks like a 90degree crank-gear is best option

Where do I get them from then?

CBS might have them. They are very good to deal with.

I think SVC sell them as well.