"Mark Fitzsimmons" wrote in message
oups.com...
Tenons still waste wood.

One of the reasons for using a mortise! Seems counterintuitive that the
same jaws holding inside versus outside could make the claim to "saving"
depth, but since the standard bowl uses the outside (convex) portion of the
wood as the bottom, it works out that way. The mortise takes advantage of
the existing contour. \\ //

Of course, this thread has taken a life of its own. I like the ease of use
and re-use provided by the pin chuck when roughing, as well as the safety it
gives over drive centers and single screws. Also makes it a cinch to make
the mortise, because the bowl will hang there on the pin chuck just
perfectly.