Chipwd,
Just as a point of information, the AL ACD system is a MECHANICALLY opened closure device. The closure device is physically opened and held open when the yoke is tightened into place. Gas pressure is not required. As opposed to Oceanic's PNEUMATIC closure system where the device is held open by gas pressure. To the best of my knowledge, there have been no problems with the AL system, but the Oceanic system has had a few growing pains.
Also, the Legend octo is indeed identical, except for the color of the faceplate and yellow hose, to the standard Legend second.