Thats really right, these spitfire fans are only on the waterpump of spitfire. But the size of these Fans are the same like the 311868 Fans of vitesse, only with smaller holes. Thats why I have make larger holes in the fan to fit ob vitesse crankshaft (see my photo). I just wanted to show my solution if anybody have no enough space between the radiator and crankshaft for the larger fan from the Mk2 vitesse Mike me. Thats all what I want, it was a great conversation with you, See you