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A small assembly of standard parts that is dimensionally driven from the setup table can be tagged as an independent group.

This allows you to add multiple copies of the small assembly, and get a separate control in setup for each one.  Without using independent group you will get only one area in setup that controls all of the assemblies.  Even if they were added as "Different Component"!

To set this, open your saved standard assembly and go to the setup table.  Right click over the setup group name, and choose "independent group".
This tells the system to create a separate setup area for each time you add this small assembly into a design.