Just saw a question on changing the windscreen wiper blades from right to left. Yes this can be done. I have a 1967 Commer and the way I did this was by removing the access cover. On the back of the wiper motor you loosen the three retaining screws and turn the round metal gear box cover from 90 degrees (R.H. drive) to 270 degrees (L.H. drive). If you turn it slowly you'll find when your wiper arm is at top left hand side before it starts returning. Once found just tighten up the screws and all is good. Hope this helps!!