I started using my Smart Alec again recently and it struck me that it would benefit from more O rings. Mine is maybe a bit over a year old so maybe this has changed but as near as I can tell I have just one in the main compartment. With just 3 pouches the entire bag is pulled in one direction and sags. Also it's kind of hard to sort through the pouches when they all join to the same ring. I never really realized this until I got my Synapse which seems to have many more options for O rings.