1. Cubeful 2-ply    13/11*/6                     Eq.:  -0.0337
       0.4829 0.1141 0.0025 - 0.5171 0.0981 0.0021
        2-ply cubeful prune [world class]
    2. Cubeful 2-ply    13/11* 7/2                   Eq.:  -0.0674 ( -0.0337)
       0.4708 0.1205 0.0025 - 0.5292 0.0993 0.0025
        2-ply cubeful prune [world class]
    3. Cubeful 2-ply    13/11* 6/1                   Eq.:  -0.1185 ( -0.0848)
       0.4613 0.1151 0.0029 - 0.5387 0.1154 0.0030
        2-ply cubeful prune [world class]
    4. Cubeful 2-ply    13/11* 8/3                   Eq.:  -0.1299 ( -0.0962)
       0.4609 0.1128 0.0028 - 0.5391 0.1191 0.0034
        2-ply cubeful prune [world class]
    5. Cubeful 2-ply    13/6                         Eq.:  -0.1429 ( -0.1092)
       0.4494 0.0724 0.0010 - 0.5506 0.0683 0.0009
        2-ply cubeful prune [world class]

hitting gives opp more timing problem.