Cam-locking positioning mechanism

A locking positioning mechanism, comprising:

• a first locking element and a second locking element, said first locking element and said second locking element rotatable relative to one another about a common rotational axis between a locked orientation and an unlocked orientation, said first locking element and said second locking element axially translatable relative to one another when in said unlocked orientation, said first locking element comprising first locking surfaces, and said second locking element comprising second locking surfaces, said second locking surfaces configured to clear said first locking surfaces in said unlocked orientation, said second locking surfaces configured for an interference fit with said first locking surfaces in said locked orientation
• wherein at least one of said first and said second locking surfaces comprises a detent including a blade structure disposed in said detent to bite into the other locking surfaces thereby discouraging relative axial translation of the first locking element and the second locking element.