Duplicate and Mirror

Duplicates those parts of the SDS geometry that do not form a closed surface. The duplicated geometry is mirrored about the open edges loops (holes or outlines).

If there are more than one open edge loop, then selecting an edge or face at the open edge loop selects the edge loop about which to mirror.

The mirrored geometry is connected to the edge loop. The vertices at the edge loops are not duplicated.

Duplicate and Mirror with a selected edge loop