John, thanks for your advice. It looks a though it is necessay to remove the bell housing to effect this mod - something that I am not capable of. However I wonder if a piece of thin aluminium sheet shaped to fit could be stuck down with some mastic. It could be removed easily if needs be. It would not be the end of the world if it fell off from time to time as it would be esy to replace. If I eventually had to have the bell housing revove the a pice of aluminium could be screwed in place.
Last edited by Felix42; 07/03/20 03:34 PM.
