So if we move the controller to the firewall, a remote display makes sense. just 4 wires go back to the receiver, everything else is under the cowl except possibly a display mounted in the airplane's dash board. I may want to move the air pump to pin 2 as i can do some more timer stuff and future proof a custom board. The rpm input would likely move to pin 1. If we use a remote display the controller winds up about 1"x1.5"x1/2" overall size.

If anyone has any other ideas they think we should implement, now it the time to bring it up.