Used but not by me, tested successfully on bench with servos connected to gear and door outputs. Case has loop side velcro adhered on bottom.

$50 shipped to CONUS. PM for PayPal info.

https://www.chiefaircraft.com/jt-gds.html

Plugs directly into your receiver and operates up to 3 separate door servos / valves and retract servo / valve. Almost any combination of operation and delay can be programmed in. It even remembers the last position your transmitter was in. This prevents turning on the plane and having the gear retract because your transmitter switch was in the wrong position.

Operates from 4 to 7 volts, 10ma.
Door and gear outputs adjustable over the entire travel range
Door open delays adjustable up to 3 seconds
Door close delay adjustable up to 13 seconds
Mode 1
a - Doors open, gear down, doors close
b - Doors open, gear up, doors close
Mode 2
a - Doors open, gear down, doors stay open
b - Gear up, doors close
Mode 3
a - Doors open, gear down, 2 doors close 1 door stays open
b - 2 doors open, gear up, 3 doors close

I'll take it at your price! Call me 502-905-6990 Thanks Will

Pending.