18 freedom ??? So far as Caesar II is concerned, since it uses beam theory, fixing of six degrees of freedom, X,Y,Z, RX, RY, RZ is all it takes to fully restrain a point against all translations and rotations. What would the other 12 do ??

Either way the question raised concerned the definition of an anchor and a translational restraint and differences therein.

I don't think it is a difficult issue at all, just one that needs clarity.