I'm a little late to the party, but here's the article I wrote on it:
http://garden.org/ideas/view/g... I've been making hypertufa for years and none of them ever broke from being outside all winter.
I took pictures (for a tutorial) the last time I made a trough with feet and always planned on writing another article, but I never got around to it. In my method the feet are created in one piece with the pot. I'll try to do the tutorial sometime soon and post a link here.
