I have been working on my switch box. Four channel remote driving 4PDT (4 pole double throw relays). The remote toggles on off on each channel... one press = on, next press=off.One switch on the relay will activate the air solenoid. The other are available for signals.
This little video shows (not very well) the 10mm LED changing from red to green.
It is all 12VDC with dropping restores on the LEDs
