Some of you asked how I turn the bottom of my bowls. These pictures will explain it probably better than I can write it. I did not invent this, and I don't remember where I learned it. Those of you that are using this method just bare with me, I am only trying to help those that asked me to post these pictures.
Picture #1 shows the Stronghold Chuck holding a device I found in the plumbers section of the local hardward store. I tried a 4 inch pipe, but could never could get it sawed square so this worked better for me.
Picture #2 shows the thick mouse pads I use to protect the inside of the bowl.
Picture #3 shows the bowl set up and ready for me to work on the bottom. If you remember to find the center while you are turning the bowl it will help. If you do not, use a center finder because the tail stock revolving center must be in the exact center of the bottom. I decided to use this 14 inch wild black cherry natural edge to show this method because it is difficult to use other methods of working on the bottom of bowls with natural edge pieces.
Hope this helps.