Since Mark was afraid to show you his captive hollowing set-up I'll show you mine. The "D" Handle was made by a friend (who will remain nameless) from 3/4" dia. steel . The scraper bar attachment cam from Don Pencil and works well. I also have the Jordan boring bar which I really like. The secondary "captive" rest I made out of 3/4" oak with 3/8" steel rods embeded to help it slide easily. There are basic plans for this at Craft Supplies site. Think you can find it under Jamision. I'm working on a laser attachment but still a couple of weeks befor it is done. This is one of those things that after you get it, you wonder how you ever lived without it. Makes hollowing so much less stressful on hands, wrists and arms.