I am unsure if this will work on other cameras, some of these parts are specifically made for the Canon 6D.
This was my alternative to removing my ballhead mounting plate and replacing it with a 15mm setup everytime i want to add some focus or zoom control to a shot... With the locking washer it is a rock solid mount and incredibly east to setup and take apart, plus it packs down easier.
I should add that the L bracket is great for panos, which is the original reason why I bought it. It makes it a little more bulky, but since this is my timelapse setup and not a walk around camera for me, I have no issues.
Lens Apparatus available at http://thechronosproject.com/lens-apparatus/