Right now, to automate your fuel creation systems, you require Buildcraft or another mod that can transfer liquids between machines and all that, so I was wondering if it would be possible for us to have 2 new blocks, basically specific pipes: An Export Pipe, and an Import Pipe. Export Pipes would be red, to indicate removal of liquids (both would be GC-liquid specific, so no cheating with other mods and putting the liquids into other machines or even tanks unless the machines are GC) and the Import Pipe would be green, except when it is connected to both an Export pipe and another import pipe. Then, as it pumps liquids, it shows the color of the liquid. Just really simple crafting too: a 'chest' shape made of glass blocks, with 2 variations (obviously): the Export Pipe would have a lever, and the Import Pipe would have a redstone torch. Also the Export pipe, when right clicked, would turn on or off, a visible connection to a machine being the indicator of it being active or not.