I originally typed it was imperative the stamp was face up but i was afraid like myself in a bit of a rage id see that storm out and start flipping in over i didn't want to do that to youI'm going to fill it 1/2 way with the hose to protect the shelves from caving in as they are still a bit soft. After that I'm hooking up my roof gutters to it and letting good old mother earth do the work. In about 2 weeks or so I will drain it and start the rock work.
I'm super glad to hear it does not have an inside and outside. That would be a nightmare to flip it over.