I'm seeing there are at least 2, I th in n maybe 3 ways people do these offsets. This is a response to my question on another site and is the way I I was working toward in my noodle. I may change it later once I have a better grasp of everything.

"leave your most commonly used tools in pocket 1~15 put anything else in 16~21 set them all off the table surface and use positive fixture offset measured distance from table up the jaws or fixture that way you can usually leave all tools intact in the carousel"