Attachment problems MK3 CargoBay

[Bogeyman]

Hi,

I am planning to build a cargo plane that can air-drop stuff while flying. My idea was to have the shuttle-cockpit and then 1 or 2 MK3 cargo bays, with the bay doors facing downwards. I then wanted to connect any payload with a small decoupler to the center of the cockpit bulkhead.

The idea was to fly over a certain area, open the bay doors and then "stage" the decoupler which would then let the payload drop out of the plane.

Then quickly switch to the falling object, trigger it's parachutes (I dont want to deploy parachutes at the same time as the ejection because that would drag the payload into the plane) and the landing legs and let it drop to the ground on its own while hopping back to the plane and land this one home safely.

Almost proud of my idea, I added the decoupler (the small white red one- forgot the name) to the green connecting ball at the bulkhead but now I cannot add anything to that. I also tried attaching docking ports, which works fine but then you cannot add anything to that docking port.

Whats the sense of having this cargo bay if I cannot transport something (also to space, like a satellite) which then cannot be released.

Am I missing something or do you have any ideas?

See picture below of my test-construction:

http://fs2.directupload.net/images/150503/8wdlsv2t.png' alt='8wdlsv2t.png'>

Edited May 3, 2015 by Bogeyman

[Bogeyman]

I should google more: http://www.reddit.com/r/KerbalSpaceProgram/comments/2pka11/

Solution is the ALT-key