G76 TOTO NO FURTHER A MYSTERY

Or do you've got application it at 0 levels if you need to run a end afterwards? Sorry for your questions but I have to have this this all figured out just before I pop a twelve' shaft On this lathe that requires threads. A little something modest if I messed it up would not be an enormous offer, but scrapping a 12" dia. x 12' long shaft is sort of