^^^ I did that initially, but it irked me to no end.
Making doubles is REALLY a lot less work that it might seem and requires the most minimal investment in materials. I use pop-rivets, but it can just as effectively be done with nuts & bolts, or even high-temp hot glue should do the trick. Just make sure to use a high-temp gun/glue. Low-temp isn't quite enough for a permanent bond. The only thing required that probably isn't sitting around the house for most of you guys is the material for the sleeves. The binder sleeves that I use are DIRT cheap and available at most any local office supply store.
So worth it IMO! Plus it opens the doors to storing larger items like controllers, portables, and such
