I have an assembly that I wish to also make mirrored version of. So I did the following steps to try and achieve this: I opened up 1 of the 3 sub-assemblies that needs a mirrored version of itself (the sub-assembly consists of the sheetmetal part and a component pattern of a pem nut). I then opened up the newly created mirrored version of the sub-assembly, and saw, as expected, in the feature manager, that the part was a reference of the original version, that's all no features shown. I then went to the main assembly and saw the new mirrored version of the sub-assembly in the feature manager. Then I wanted to add screws to attach the mirrored version to the unchanged parts onto the rest of the assembly. I did this by inserting the "seed" component into the assembly, then I put in the needed mate to attach the mirrored version of the sheetmetal part to the "seed" screw. I then intended to make component pattern of the screw, but since the mirrored part was mirrored, the feature manager of the part only showed the mirror reference to the original part. I was expecting to be able to select the hole pattern, but since it isn't listed, I couldn't select it. Any insight on how successfully accomplish my intent would be appreciated.