RE: SkyMaster MB339 Build Thread
Ian,
Now that I figured out which air source to use for the OPEN and CLOSE position of the small doors, setting up the system as I did does not involve a lot of work, just making a bracket for the air switch is most of the work and it works flawlessly. Btw, the air switch is even not very expensive: BVM #5753 $27.50
When installing it, just be sure NOT to contact the backside of the servo yet, make the final adjustment by means of the small wooden block which is glued to the servo.