I just paid an arm and a leg for a large pottery pot for my Japanese Maple. Seems if you have a variety of plastic pots, you could use them knowing your hypertuffa pot would be a tad smaller. Buy various sizes of pots and you could mold yourself an entire selection of pots! I like the idea of forming the stuff over the edges to flare out. What did they article mean when it says you need smaller pots for feet forms?