[DareBee]

I set all my tools to Z zero on the table and then I set the part Z offset in my CAM software when I program (My parts are VERY seldom over programmed at Z0).
I have multi fixtures on my table most of the time (vise, 3-jaw chuck, 4th axis,etc) and each one is datumed (X,Y) with it's own offset designation (G53, G54, G55...). So I program my part to fit the previously setup fixture, and then the machine setup is often nothing other than loading material and DNCing the program.