Yes, a Master and 1-3 Slaves...it was never going to be what Annie is showing in her Twitter feed (two stacked Z1's). If what Annie is showing is the real Z2, I feel very sorry for Z2 owners. Complete Sham. Here's hoping it is what the website marketing material shows.
I have to say that what I see in Annie's picture is what I am hoping for, certainly not a sham.
Below are quotes from the Z FAQ and are why I bought a Z2. My ideal Z2 is 2 relatively independent units, maybe with some syncing of the recipe between the two units when I occasionally brew 5gal split between the two Zs.
Most of my brewing is going to be small batches with maybe two similar but not identical recipes on the two Zs. Other times it might be only a 1Z batch and other times it could be two unrelated recipes brewed simultaneously.
My other hope is that a single Z will brew 1gal or 1.5gal batch sizes that are as consistently brewed as a 2.5gal batch. Once I refine a recipe and I want a full batch, I can then do a 2Z 5gal batch. I do not generally need 2.5gal of beer in order to determine what I want to try next.
This is what I think I was buying and hope that I get. What is in Annie's picture is what I want.
Z FAQ
How is Z different than Zymatic?
... The Pico-Z’s modular design allows stacked “parallel brewing” approach – you can brew up to 10 gallons of the same beer in one session (with Z4), or multiple different beers at the same time. ...
Can Z2 through Z4 brew different recipes in each compartment at the same time?
Yes, each compartment can brew different beers at the same time ( Z2 can brew two, Z3 can brew three, Z4 can brew four).