For throwing mugs and small bowls, I use a quick-change bat system. To make one, you need one square plastic bat that attaches to your wheel head with bat pins, PVC molding from the hardware store, PVC cement, and some commercial 6-inch-square terra-cotta tiles. Cut the PVC molding into two 5-inch lengths and two 4-1/4-inch lengths. Place one of the terra-cotta tiles in the center of the plastic bat and dry-fit the PVC molding around it, leaving two corners open to make it easy to remove the tiles. Glue down the molding with the cement and let it dry. Remove the tile from the assembly while it dries or you won’t get it out later. Once it’s dry, mount the plastic bat on your bat pins, insert a terra-cotta tile and throw your pot. You can quickly remove the tile and insert a fresh one for your next pot. A terra-cotta tile costs about 30 cents, so it makes a really cheap bat.