Looking for plans... not sure what it's called... thingamajig... But the router base rides in it for cutting sliding dovetails or dado's. It also needs to be adjustable for various lengths and have stops on both ends.
Thanks
http://www.youtube.com/watch?v=u7ziwuIpnVY&eurl=http://blog.makezine.com/archive/2009/03/dels_wooden_machine.html?CMP=OTC-0D6B48984890
I can't even imagine the time and brain power that went into this thing.