We aimed to make the couplings as easy to use as possible.

Fitting tools

Take ejector fully back.

Put tool in machine.

Bring ejectors forward.

Twist outer ring 30 degrees clockwise, to the stop.

Take ejectors back.

Job done.

Removing tools

Twist outer ring 30 degrees anti-clockwise, to the stop.

Take ejector fully back.

Remove tool.

Job done.

Maintenence

The ejector should have some lubrication. If the balls look dry, then apply a little grease.
You could put a little grease on the tool part when changing tools.