You know after doing all the research on anti-tilt followers and all the advancements other manufactures claim to be the latest and greatest, I have yet to have any of my USGI mags fail even once and I use them all the time. This is not a plug either way, but if something works why try and fix it? Personally I buy whatever is on sale and run it for a while. If I find a problem I try to iron it out and make them run reliably, but if it still does not want to work then I throw them in the trash. The only mags that I had to throw away were some cheepo steel mags I bought off of CDNN that had pressed steel followers. they would bind like crazy so I threw some magpul followers in there and they did not fit right due to the cheaply stampped guides and would bind just as bad as the steel pieces of crap. So I kept the springs and base plate because they seemed alright and threw away the rest. At $5 a mag I new it was a gamble.

Mags are the most over-hyped piece on a gun. Yes it is important that they are reliable, but they are super simple by design and if you cant figure out a way to file or tweak one to work perfectly then you might want to reconsider hobbies.