what a reborn great idea. in the fifties we were able to buy replacement drain plugs that had little magnets connected to them by a link of wire . i used them in my austin a40 but can not remember ever seeing any particle accumulation.the magnet was similar to the one on a parts pick-up tool. mike Cyclops Bicycles Ph. (604) 545-5644 Fax (604) 545-1167 michael_mulholland@mindlink.bc.ca