Hello, I have a little problem understanding the interface features of SolidWorks 2014.

I have an assembly model that I would like to mate in 4 different configurations. All that must be changed are mates and not parts. Then I need to run one and the same flow study for all these configurations.

I see there are 2 configuration trees already, one for the model and the other one for flow simulation. Neither one let me use different mates for each config. As soon as I change them, they change in all other configs as well. How can I get this correct? Thank you.