From parts to assembly

Hello guys,

I have been trying to create an assembly through a part.

So Basically I have created 5 bodies in a single part, right now I have save 2 of my bodies as one part and the rest of the 3 bodies as single part. But in order to do this, I have to individually combine the bodies, the assembly feature doesn't seems to have the function of making 5 bodies into 4 individual parts (2 +1 +1 +1).

Is there anyway to do it?

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