I am taking a bowl-turning class at a high school. So far I have made 2
bowls and a plate. There is one class left; I would like to make a cup,
basically a cylinder with a little radius at the bottom. I am a bit
concerned about not having time to finish it.

The way we are taught to do it is to screw the workpiece to a faceplate and
cut the sides and bottom. Then glue a wood block to the bottom and screw
the wood block to the faceplate and turn the inside.

To save a little time I glued the wood block on before I started. Then it
occured to me that I can screw the woodblock to the faceplate and turn the
sides and interior with the same setup. Except for the radius, there isn't
much to do on the bottom and that will be bigger than the wood block.

Is there anything wrong with this idea? It certainly avoids the possibility
of not getting the two mounts on the same exact center, since there will
only be one mount.

I also thought of drilling some of the interior out at home to save a little
time. Is that a reasonable thing to do? If I don't get it precisely
centered it might be more trouble than it is worth. Any other flaws to the
idea?
Thanks