Well, that's what I used to use, Tom.. Sort of a new jam chuck for each need, so it was only if I had a few things the same size..
Since I made 3 or 4 different size vac chucks, though, I find that one of them will fit the piece I need to reverse, so I tend to use them a lot..
For the SS with a non-threaded spindle, picture a face plate with either a turned cylinder or a block of wood and piece of plastic pipe, with a soft surface on the gripping end.. (I use old mouse pad material) If you have a selection of these, say from 1" to 4" diameter, you just put it on the face plate, hold the bowl against it and hold it with the tail stock..
It's a little easier with a threaded spindle.. Just use a nut with the same thread size, bore our a chunk of wood and countersink the bolt with a little epoxy.. Then you screw it on to the spindle and turn whatever shape you want...
Keep in mind that these are not "chucks" in the sense that you're turning the whole project with them, they're for holding the almost completed piece so you can finish the bottom.. I have 4 or 5 of them and they take up very little room and can be tucked away somewhere until you need one..
mac
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