 nslice  deg   guard ON (s)  guard OFF (s)   ratio  note
      4   14         35.060         39.066    0.90  
      8   14         66.274         71.695    0.92  
      8   20        818.772        953.812    0.86  
     16   14       1751.158        675.809    2.59  
      4   14          0.012          0.014    0.84  no sliver
