For many years I have been wondering why a pioneering manufacturer like Manfrotto, with great innovations in their account, had chosen to stick in proprietary quick release designs on their ball heads. Although these designs were very advanced at their time, they were not compatible even between them compelling both the users to have a limited choice of accessories and Manfrotto to maintain 3-4 different lines of products.
The continues expansion of the Arca-Swiss® dovetail design between competitors offered a large selection of support gear and accessories with great versatility, putting the once market leader Manfrotto almost in isolation in the ball head segment.
But it's never too late.