One of the ideas I've had for a redesign of my old Sears RAS (while not quite as old as yours, it's a similar construction), is to replace the wing bolt/key (which clamps the fence parts to the main table from behind--those with Sears RASes will know what I mean) with horizontal toggle clamps. I even picked up a pair at Woodcraft a while back. I still think it'll be a nice adaptation (and convenient). You might want to give that a thought.