I was curious if anyone has expanded an Expert Sleepers ES-3 or ES-8 to the max, and has set up a second ES-3 or ES-8 via a second ADAT stream (or done an aggregate device with some combo of ADAT and either SPDIF or USB)?

I can look up a module like an ES-3mk4 and find racks with that module in it, but not a rack with more than one.