Joseph Herbert on mon 7 dec 98
The Buchanans wrote: "The bull's eye level I mentioned before is a great help
with giffin when you are trimming shapes with uneven rims such as pitchers"
There are two problems with trimming uneven shapes. First, the bottom must be
level and the bulls eye level is very helpful with this problem. Second, the
center of the shape must coincide with the center of rotation of the wheel.
This is more difficult. If you arrange a plumb bob suspended from the ceiling
above your wheel so the point is at the center of the wheel head, you can
easily assure the center of the piece is on the axis of the wheel head.