On Apr 28 2005, 16:58, Brad Parker wrote: Look at the fingers on the "1" plug. The protruding finger on each side has two edges which can be long or short, but one of those is just used to tell the drive there's a valid plug inserted. A matchstick makes an effective substitute :-) A zero has short edges on upper and lower left, short on upper right, intermediate on lower right (that last one is the "valid plug" finger). A one has short edges on upper and lower left, long on upper right, intermediate on lower right. A two has short on upper left, long on lower left, short on upper right, intermediate on lower right. A three has short on upper left, long on lower left, long on upper right, intermediate on lower right. ISTR that when I made my own perspex plugs, before I had real ones (other than a "zero"), I found there was no real difference between "short" and "intermediate" -- "short" doesn't move a contact, "long" or "intermediate" does. -- Pete Peter Turnbull Network Manager University of York