I was also interested to hear what Stan said about the clutch system on the fan - about the fan not starting immediately when the motor does...I'd never heard that before, and I don't think it's the case with mine, I checked this afternoon. Can anyone explain this feature further, and whether or not it was used on the British versions? And where is the clutch located? The only difference I can see with the 900 and 925 motors is that the top bearings are totally sealed.