So more precise than all of the clocks in the world once you exclude "the most precise clocks in the world"? Yes, MC#2 is a hydrogen maser clock. But you fail

So more precise than all of the clocks in the world once you exclude "the most precise clocks in the world"? Yes, MC#2 is a hydrogen maser clock. But you failed to mention that it is driven by an ensemble of 41 clocks, 4 rubidium fountains, 19 hydrogen masers, and 18 5071 cesiums. And if we are talking about NIST-F1, don't forget F1's new friend, NIST-F2, that is three times as accurate and soon enough the Italians will have there very own version IT-CsF2. And then there are the lattice clocks from JILA...