I know they require a certain amount of space above and below the water level. And your socks are regular 4" socks? The same that would fit in a sump? You can check their site to see the size requirements. If everything else is in line, I don't see a reason it shouldn't work.
I am sorry guys. I just got an email notification for this thread today. Not sure why. I apologize for not getting back to you sooner.
Both units would need their own individual motor on the side of the unit. What they would share is the small blue controller they connect to and a single power supply. The small blue controller box can handle one or two motors at the same time. You would only need one sensor for both units. When the water level goes up and triggers the sensor, the blue controller will roll both units simultaneously.
Hope this helps!