Multiple racks with Helix?

[End Times]

I'm in the process of rack building and was wondering if is it possible to run more than one rack off of one single Helix DBS Proportional Thermostat?

If so, how many racks could I run off of one? I realize whatever you're running has got to be within a certain wattage, what I guess I'm really asking is how many plug-ins does the Helix have, and can you get more than one probe in order to monitor more than one rack?

The reason I ask is I checked out Strictly Balls and saw how Mykee built several "mini-racks" that could just be stacked on top of one another. I like that idea, as that way you can choose to only heat the smaller sections that are being occupied rather than heating an entire rack that may be half empty.

Oh, awesome site by the way, Mykee!