Dear Terry P. Real thanks for the info.

I,ve also come up with the following
DECL/LOCAL,DOUBLE,alpha
alpha=PROMPT/'Pleas enter the new "x axis" GAUGE DIMENSION for "A3" so as to make "A4" EQUAL & OPPOSITE to "A3" in the "X axis" '
F(A3)=FEAT/POINT,CART,alpha,14.185,100.342,1,0,0

This has helped me to solve my problem on my previous topic of "plane creation from 4 pts." so as to set-up a casting stacking axis on turbine blades

Cheers for now,
keep CMMing
Richard