I've had occasion to need 6 identical parts.
I wanted to perform machining operations on both sides.
I started a "Double Sided" job, drew my Top and Bottom vectors and generated my tool paths. Looks good.
It came time to use "Array Copy" to repeat it 5 more times.
That is when I realized that I cannot seem to select the vectors on both sides to be included in the Array Copy.
This seems to be an area needing improvement in the new Double Sided capability of the program.
In the end, I had to delete all vectors from the bottom side, array copy the top side vectors, re-create all the bottom side vectors and then generate the tool paths for top and bottom.