Hi Brian;

Yes, you can use the single action jet-tronic valve for your gear, since you are using spring air, but you need to use a DOUBLE action jet-tronic valve for you gear doors (one action to open the doors and the other action to close the door). Here is the procedure:

1. Plug your sequencer to the gear channel on your reciever
2. Plug your single action valve for the gears to GEAR on the sequencer (note the polarity)
3. Plug the Double action valve for the doors to D1 on the sequencer (note the polarity)
4. With a small screw driver move the dial to point to SP (Switching Point). Count the clicks as you move the dial and make sure you are pointing to SP.
5. Turn on your transmitter and move your gear switch to"gear in" position
6. Turn on your reciever and after about 2 sec. switch the transmitter to "gear out" position.
7. Now turn the dial back to MODE 2 on the sequencer.. Count back the clicks and make sure you are in Mode 2

Please note that sometimes if you use the Jet-tronic valve they need to be programmed with that blue button. You can test your sequencer on the bench by pluging in servos in the sequencer (Gear position and D1 position) and see how the servos travel in SEQUENCE.

I think the Jet-tronic sequencer is very complicated. There are other sequencers in the market which are simpler to operate.

Good Luck