I think I'm going to order one of these things and thought I'd check to see if there are any opinions as which one to purchase. I'm leaning towards the Kelton, but can be persuaded. I had decided on Don's offereing but ran across a less than flattering thread here on SMC about shipping, etc.
Craft Supply's Kelton Woodchucker Mandrel - $93.50
Rubber Chucky - $84.95
Don Pencil's Jamchuck - $39.95