On the subject of the Crye roll up dump pouch, please allow me to suggest an alternative placement that some may find useful. As shown here, at the bottom of my PC:
This is something that can be done with almost any plate carrier and functions similar to the HSP "Hangar" pouches, except for the fact it does not interfere with any front lid retaining straps because it is sandwiched inside the plate pocket rather than adhered to outer velcro field.
This location I've found is beneficial in several regards. Loading to and from the dump pouch is potentially faster not only because of the shorter distance traversed, but also from the simple ability to look down and see what you're reaching for. (No more grabbing twinkies or cupcakes by mistake.)
When deployed the weight is centered over your stomach which is far less obtrusive, entangling and annoying under movement than one constantly slapping against your legs. Best of all, this placement allows you to multipurpose your dump pouch for a variety of tasks; be it an IFAK, ammo sack, or just anything you might occasionally need storage for.
For those of you like me who normally wouldn't consider carrying a dump pouch, this is one low profile option you might find worth evaluating yourself.