Loop Cut and Slide Hotkeys


I’d like to change the centering of the loop cut (Factor 0) from a right click to a keyboard shortcut, say, ‘Cmd Return’.

In ‘User Preferences > Input > 3D View > Mesh > Loop Cut and Slide’, I cannot see an option to change the input for the Edge Slide Factor.

I’m new to Blender, please show mercy.

Blender 2.78, OS X.

Thank you!