How to get default editors without NSArrayController copies?

FROM : Stefan
DATE : Sun Aug 13 13:58:26 2006

Using option-dragging an entity to a window, IB creates a default editor
with respective controllers - each time new controllers, even if the 
entity
has already NSArrayControllers in the nib.

Although I think this isn't a real problem, I don't like it.

Does anybody know, if I can consolidate to identical controllers to
one without breaking bindings?

Moreover, I'd like to know, why IB creates identical controllers. Aren't
identical controllers bad style?