Part inserted into another part - mass issue

I'm working on several dynamically changing models with several coworkers. Long story short, I am using the insert part within a part to reference key features in a way that to keeps things clear for everyone on the project. (I do have to insert the solid bodies and not just the sketches)

While inserting a part within a part, the mass is now the total of both. I do not see a checkbox or command to make the inserted part a ref. Am I missing something?

I have been adding a Delete-Body command at the end of the tree to removed the inserted part ref.  

The ref part is also hidden, so I have unchecked the box "Include hidden bodies" in the Mass Properties.

Either one works. But wanted to ask if there is a more direct "exclude mass properties" checkbox somewhere I'm missing. 

SolidworksParts And Features