This is all great and timely info for me. 
I’m trying out 2x 3.9 gallon Autopots with the 13 gallon flex tank.
The flex tank has been giving me problems with leaks, but it seems stable for now. Anymore issues it will be strike three, and I’ll go with the Brute and brass spigot (Thanks @Dirt_Wizard 
)
I had an issue with the Aquavalve, the hose wouldn’t uncoil and caused one of the valves to twist out of place and that started a flood that I caught only because I baby sitting the system for the first day. Tried various way to remove the coil tendency, but ended up using some bonsai wire to coiled around the hose to force it straight. 
I’m only using 5 gallons max in the reservoir so I think if I do flood the 2’x4’ tent tray will contain it. But still I was thinking about seeing if there’s an automated way to detect a flood starting and then shut off the line from the reservoir. 
I found I recent topic on reddit from a grower who has a setup with sensors and an inline solenoid shutoff.
https://www.reddit.com/r/Autopot/comments/1k45hb0/i_had_3_floods_in_1_year_so_heres_my_flood/
Edit:
Does anyone else read this but hear it as coming from Spongebob Squarepants? 
