IMO, While you can use the excursion with doubles, I bet you will quickly find that you don't want to. My experience in trying to use doubles on an older model of Oceanic BCD (Which also used that bracket) was that it places the doubles a little off the back and as a result it allows the doubles to feel as if they are moving around a little and not all that stable. I also found that it made me feel like the doubles wanted to turtle me easier. One last thing, while the Excursion is a great BCD with lots of attachment poitns (my shop sells them) if your going into doubles I can assume your getting into technical diving, trust me when I tell you, you'll appreciate the adaptability and extra comfort you'll get with a Backplate and wing over the Excursion. My advice make the switch to a BP and Wing for your doubles and keep the Excusrion for your OW diving if you don't want to move your BP and wing from one set to another.