multiple AXR4Ts' time clock source

In a scenario where multiple AXR4Ts are daisy-chained, is it possible to set one of them to be the clock source for the others? The manual seems to indicate that an external word clock generator is desirable (or perhaps required) but I wanted to clarify.

Any thoughts?

Any thoughts, anyone?

Hmm… thunderbolt carries digital clock, so this is really weird… With my Apollos the first on the chain is the master and all the others slave perfectly, and is even said as such in the manual. I even slave my adat expanders of it with zero issues.

I am curious about the AXR4 and a nuendo turnkey integrated setup but there are so many unanswered questions I have.