Double sided PDF Problem

[Brian K. Duck]

I’d like to print decks of cards, front and back

The front page is always easy.
Cards print left to right: 1-3

Flipping the pages, in portrait layout, the cards are now face down, in order but reversed: 3,2, 1.

The problem is, printing 3 wide by 4 tall, aligining the two.

Any existing solutions or discussions?

Thanks for your time,
Brian Duck
Bduck at m at c dot com