Connection table for OCT
   8   7   5
 C
 C
 C
 C
 C
 C
 C
 C
   1   2
   2   3
   3   4
   4   5
   5   6
   6   7
   7   8
   1   2   3   4 180.0   5.0
   2   3   4   5 180.0   5.0
   3   4   5   6 180.0   5.0
   4   5   6   7 180.0   5.0
   5   6   7   8 180.0   5.0