Hey Hey..... at least you can read / spell ......I can only write!
CLOBAL
Graham was supposed to do a full write-up on it sometime for Mach4.
I think you will only find the "Global Shift" term used once in Smid's books and it is not defined.
Have a look at the Mach4 lathe manual for definition of G52 and you can also see page 14 of 21 Appendix "F" in the LazyTurn Manual
for a partial use of G52.
Other than that, it's a DAH
on my end also.
RICH