Dude, I installed all of them individually with A9LH and Luma CFW. All I did was after I finished with one 3DS that had A9LH and Luma CFW installed, I made a backup. Afterwords, I system transferred it to 3DS #2 and made a back up for 3DS #1. After I finished installing A9LH and Luma CFW to 3DS...