I would like to be able to have different psi (due to different styles of beer I want to have on tap) and have them connected to just one CO2 bottle. I believe I saw a hose insert at the Homebrew Con in Minneapolis this past June that did this. You could set the psi for each of the small metal inserts you added to the line going to each keg. That way you could have 1 CO2 bottle and a specific psi for each keg that was connected. I can't recall the name of the company. I'm wondering if anyone here knows of this product or maybe you know of a way to do this that with different equipment/supplies. I like having a variety of beer in my kegerator, and currently have a stout, white ale, Belgian ale and a lager to dispense, and shouldn't use the same pressure for them all.