My dad, Wayne Bower, has been making turning tools since he started turning in 2006, but recently he finished up what I think is his crowning achievement. (next to his wooden homemade mini lathe) He made a snake hollower, also know as an elbow hollowing tool. A great discussion about it can be seen on Family Woodworking here. Previously he had also made a D-handled capturing rig as well. I've had the pleasure of using it before and can't wait to use the new snake tool. Here are some pictures of the tool and you can click here for a pdf drawing of how to make it.