Quote Originally Posted by David Reed View Post
As with any piece without much support to the edge, I finish turn and finish sand the exterior of the piece completely before hollowing. Then hollow and finish sand down a short distance, often only one inch at a time allowing the solid wood below to provide support. Certainly doesn't eliminate the need for tool control but certainly reduces bounce and recoil from thin unsupported wood/air.
I think you are supporting my idea - am I right? I did have another thought about creating a temporary support for the void. I think it could be either inside or outside the workpiece depending on where support would be needed. It would have to be something with low elasticity otherwise the piece would be distorted around the void.