if you have the room, I agree with the JMP sequencer. Just installed one on my new Firebird, along with Tamjets Gear Failsafe. Nothing to program except the failsafe pressure setting on Tam's unit. On Tom Cooks unit, all you do is flip two dip switches, one for gear doors closed after gear down, or gear doors open, and the other sets the gear door delay at 3 or 5 seconds......Seeeemple!

It does require 2 servos and 2 gas valves, but takes up less footprint than the EV units.......Tom's gas valves pass more than enough air to operate his humungous cylinders on the Firebird's retracts.

UP-6 or Smooth Stop II for proportional brakes........