ORIGINAL: Gordon Mc
Perhaps better yet - put the shut-off connectors in the line between the UP valve and the gear door cylinders. That way, you can let air out of the cylinders but have it keep pressure for the gear.
Yea, that's what I was originally thinking, but I believe that once the valve to move the doors up is open, it stays open. If so, breaking the line to the door will empty the whole system. BTW, I have both the gear and the doors on the same air system. My thinking was that the doors have to operate in order for the gear to operate, so if the door system leaks and won't operate, it does no good to still have air in the gear system. The brakes and speed brake are on a second, separate system though.
Bob