Richard - it's moderately possible, oddly enough, if I believe my father. According to him (and, obviously, setting aside Packard Merlins), only 4 or 5 people through the war cut the supercharger drive gears at the Nightingale Rd factory. He told me this in the rather loud voice he developed in later years, whilst prodding with his walking stick at a Merlin under a work bench at Duxford - much to my embarrassment!
