Hello All,
I have just posted my final review of the Richard Benham Rim Chuck at my web site: . This is a very fine chuck for finishing the foot of bowls. I found it also very useful to hold a rough turned and dried bowl while re-turning the foot to fit the chuck. It may be a bit expensive, but it is less expensive than a vacuum chuck set up and it is more secure than the Longworth Chucks that I've used. The file is a PDF and a fairly large file.
Fred Holder