Let the Paynes take the strain Article from "Classic & Sports Car" Magazine by Paul Hardiman Building up Rolls-Royce 20hp 'six'   Aside from making the overdrives - complete kits with propshaft and wiring for a Derby Bentley are £2,800 - Paynes will also manufacture small batches of components if they are unobtainable. "A customer was having trouble with the cam followers breaking on his pre-war racing Maserati," explains Tim, "so we made him some new ones." And they keep a blacksmith's corner for white-metalling bearings. In short, whatever it is, if it's worn out or broken they can fix it, and if they can't they can make it. Classic owners can rest easy.