The JetTronic Gear and Door Cyclerunit has been flown by several BVM reps in various models including the F-86, F-100, Rafale and F-4 and everyone likes it. It can be programmed to cycle the doors at different rates for gear up and gear down - just adjust the number of seconds delay you need.

Another very convenient feature is that even if you interrupt a cycle by moving the transmitter switch in error, the smart JetTronic device will first complete the initiated cycle - this may save some damage to the doors.