Xeramtheum,
I see you found a solution for carrying around a large number of pots! I tried using "1020" trays but they are much too fragile and the sides aren't high enough. Web flats - same thing. Also, none of my pots and trays quite "fit" - there's always wasted space.
Indoors I can use cardboard boxes lined with plastic bags, but outside, they dissolve in the rain.
