Purity

    1. Cubeful 2-ply    9/8 7/3                      Eq.:  +0.6020
       0.7700 0.1753 0.0052 - 0.2300 0.0762 0.0049
        2-ply cubeful prune [world class]
    2. Cubeful 2-ply    7/6 5/1*                     Eq.:  +0.5674 ( -0.0346)
       0.7364 0.2144 0.0055 - 0.2636 0.0734 0.0040
        2-ply cubeful prune [world class]
    3. Cubeful 2-ply    9/8 5/1*                     Eq.:  +0.4984 ( -0.1036)
       0.7169 0.2020 0.0051 - 0.2831 0.0789 0.0040
        2-ply cubeful prune [world class]
    4. Cubeful 2-ply    9/4                          Eq.:  +0.4881 ( -0.1139)
       0.7306 0.1442 0.0039 - 0.2694 0.0455 0.0012
        2-ply cubeful prune [world class]

- We need full prime. - getting hit lose not much, we have more contact, then.