ER - Symmetrical Linear Pattern

Here's an option I want for the Linear Pattern feature inpart modeling. Instead of picking a distance between instances, Iwant to pick a point somewhere and it makes the pattern symmetricalon that point.

To clarify, the pattern would be symmetrical on a plane that is 1)perpendicular to the direction of the pattern and 2) co-locatedwith the point you pick, wherever that is. As you add instances,they pack closer together.

If you pattern in a second direction, that has its own options,either distance between instances or symmetry on it's ownpoint.SolidworksParts And Features