ML, just saw this post. I like the challenge of figuring out an easier way. I think that a very close adjustment of more than one air line from a single pump ought to be possible if you install one pressure gauge that measures pump output pressure and one pressure gauge in each of the other individual lines. It's not as simple as just dividing the pressure because flow rate is proportional to pressure squared if I remember my fluid mechanics. I'm going to take a look at the math behind this and see if I can devise a way. I have the same problem and it would help if there was a simple cheap way to do this. I have one pressure gauge at the pump already and adding one for each line would not cost much. Would avoid more expensive temperature or flow meters. I'll let you know if I come up with something.
