Mirroring holes and cuts

Hi everybody,

I'm tryning to mirror a body with some screw holes (hole wizard) and extruded cuts. I need to merge the mirrored one with another body as the holes remain across the merged result. I've tried but I'm not reaching it at all without a double mirroring workaround (first bodies and then features).

Mirroring features, if I check the Geometry Pattern box, I get the message "Geometry pattern results in disjoint bodies"

Mirroring bodies, if I merge the mirrored with the target body I loose my holes, so they are not scoping neighbours anymore.

What could be the simplest solution to solve that?

or...

What am I missing?

Thanks!!

SolidworksParts And Features