Johnny,

Looks like the jet-tronic sequencer. It'll control both the retract valve and the door valve at the same time. Try Todd at dreamworks for the instructions.

[link]http://www.dreamworksrc.com/contact_us.htm[/link]

Duke also has this technique. [link]http://www.rcuniverse.com/forum/m_3498655/anchors_3499264/mpage_1/key_/anchor/tm.htm#3499264[/link]