Have 20 round mags and 30 round mag pouches? Hate how it's hard to get your fat fingers on them? Well with 10 minutes, some duct tape, scissors, and cardboard, we can fix that problem!
First cut about nine cardboard rectangles about the right size...easiest way to do this is measure with 3 mags standing feed lips down on the cardboard. They don't have to be exact but get close. Then stick them all in there and make sure they fit flat against the bottom. Stick in your mags and add more or take out layers to get the right height. You can always do this later after you do a field evaluation too.
Duct-tape it up like so. Use lots of duct-tape, it is very tactical. Make sure your insert fits in there snugly, wouldn't want it coming out. That wouldn't be very tactical at all. An added bonus of this is that your mag pouch doesn't collapse when you take out mags.
Voila! Here is the finished product. It closes easily; if you want them to stick up more you could add several more layers of cardboard.
I have yet to take this out in the field (aka range) and test it. If anyone does, please let me know. I think this should stand up for a while, but if it doesn't, I'm only out about $ .20 and 10 minutes. Hell, I cut the inserts while on the crapper!
Let me know how you like it.