Ok here is the answer I got for my email I sent in, This should help several questions be answered. This will be a little long for a post...
Mike B (PicoBrew Inc.)
Feb 16, 15:58 PST
Hi!
Thanks for contacting PicoBrew. Yes, our FAQ's are woefully incomplete - we're updating them daily to address the questions.
Is the Z1 upgradable? - yes! We'll have an integrated solution, most likely a power controller. You will need 220/240V available, similar to an electric clothes dryer outlet, when you go to Z2 through Z4.
Is each ring, module, independant? - Yes the Pico-Z is modular and independent. Each system can run a different brew at the same time.
Any dimensions? - Dimensions are similar to our current Zymatic, I believe that's 20" x 18" footprint or so. Pico-Z will probably be a bit narrower. Our design spec target is to fit 19" rackmount, but if not, we'll have our solution available. You won't need racks for the Z2 stack, just Z3 and Z4.
How much grain can the filter hold? - Step filter grain limits are similar to Zymatic - 9 lbs. A good Zymatic user can achieve efficiencies in the mid-70%'s and therefore about 1.090 OG; it's more about ingredient choice, mash steps/fermentability of the wort, etc. than the equipment.
I do a high-efficiency multi-step mash with a dough-in step and a good, long beta rest for maximum fermentability. And, there's no sin in using additional malt extract or even dextrose or sucrose - that's the secret to a good, dry mouthfeel IPA as well as the trick to perfect Belgian Tripel (along with good oxygenation and a bit of zinc addition post-mash). Most larger pro craft breweries use some malt extracts to adjust post-mash gravity.
Can I use a single vessel to all units? - Each Z module uses it's own keg for the brewing process, but you can use the Z pumps to transfer your wort into a larger fermenter and combine for larger batches. I know that's what I'll be doing as I brew on a 1/2 bbl system at home and have larger fermenters.
Hope this helps!