I need to make an opposite hand / mirror of a part and then take out the holes on the new version. I checked the help file and it says to first select the plane for mirroring, then select "insert / mirror part" from the top menu. I am choosing "solid bodies, absorbed sketches, and unabsorbed sketches" from the options box to create the new opposite hand version in a new file. It appears to be created as needed in a new file, but in the "Part 10" newly created file there are no options in the tree to edit any of the old sketches. I need to take out the holes of the new mirrored version but cannot. I was hoping to choose the "break link to original part" thinking maybe that would now make the part independent of the parent. I am still on SW2010. I think on the later version there is an option for a checkbox called "create opposite" but the version I have is only SW2010. Also tried using the "features / mirror" option but that just makes an opposite hand version within the same part and if I go to delete the original version to save just the opposite hand, it will delete everything. I'd appreciate any help. Thanks in advance.