completely open:
http://www.mercury1089.com/main/gall...C/IMG_0661.JPG
starting position:
http://www.mercury1089.com/main/gall...C/IMG_0662.JPG
pick up position:
http://www.mercury1089.com/main/gall...l/IMG_0199.JPG
the way that we conserve our air was, instead of actuating to tilt or drop the tower to starting position we just let the weight of the arm bring itself down rather than run air from the storage tanks.