i heard it was a bit harder to make one, becuase WAS equalink cables had a small circuit board in them limiting how much current was actually put through the board from the computer, and that circuit board is apparently proprietary to WAS. i may be wrong though.

ps. trial and error? bad idea. you never know what connector pin might have power to it, and you dont want to send unwanted currents through your board. :l

pitman (broken_halo) is pretty good with electronics, i bet he could put one together.