other stuff to do
  auto-solve only works if it has 8 wedges, especially nice to get
    12 wedges and one band for Hockey Puck puzzle.
  should use more realistic 3D drawing techniques, short of this,
    polar region should be larger to account for view of spherical
    object.
  See drawing errors for when change number of wedges or
    bands of a round cap on a arc draw in Windows.
