Hands free grinding options with Mazzer Robur?

Hello all,

At our company we have two cafes outfitted with Mahlkonig K30s and Peaks, while one store uses Mazzer grinders. The workflow benefit of being able to grind coffee without physically holding the portafilter is a bonus with the Mahlkonigs, but is there a decent solution for the Mazzers? I believe the Mini comes with a full length cradle for the grinder, and I’ve seen DIY options to hold portafilters while grinding, but in terms of cafe use what would be the best route to take?