Redstoneless redstone (Water logic)

In this video I demonstrate a very interesting concept: Water logic. Water logic uses no redstone components whatsoever, and is a single-use type of redstone. It works by using sand, water, signs, and block updates to perform logical operations. In the video I demonstrate it with a 4-bit adder made with water. Download: http://www.mediafire.com/download/mkw... Open Redstone Engineer's server: ip: mc.openredstone.org Website: http://openredstone.org/ Youtube:    / openredstone