A friend of mine is a mechanical engineer and works for a energy consulting company in San Francisco. He was talking to me about setting up pnuematic lines in a factory and one of the ways that the company was able to use a smaller compressor was having essentially none of the air lines dead end. Instead of having a tree where a main line goes out, and has branches coming off it, most of the line returned back to the tank. When you have a draw on a line, it doesn't have such an effect farther down. Granted this was a big system, as in multiple 300hp compressors, but I'd assume it works on a scaled down version as well.
Thought it was a neat idea, and something that I'll probably be implementing when I build a new shop. That is if work ever picks up again.