Vance Wood
Lord Mugo
Define what you mean by a smaller pot? If you do anything it should go into some sort of colander, pond basket, or some sort of box with screen sides and bottom. I have found this the best way to deal with trees like you have mentioned. I would usually default to my training planter but I can no longer afford to make them and still sell them at a price people would be willing to pay. How large is the pot the tree is in currently? If you have the wood working skills you might take these as a model for what you need.