Poor Man's Profec B+ Up and Running

[wret]

so the SMC you can adjust in the car any time right?

Yes, you would not be able to do it on the fly though. The SMC contolled level is adjustable by pressing the the buttons on the front. With my arrangement, two levels are available with a flip of a switch; stock and SMC controlled.

and you can choose to have it display PSI? and it can go up to 200kPa which is 29psi right?

Yes.

and what are the "Minimizer 3e1"'s?

Miniature pneumatic solenoid valves. Brand is not important. That's the one I found and bought cheaply.