This guy is pretty level headed and did a good analysis 3-4 years ago on vudoo magazine design problems.
www.youtube.com/watch?v=dYD9qTZpWoM
(paste the link it won't let me post the vid)
I've seen that video before and within the 20:03, I actually didn't hear an "analysis" or him talking about "design problems." He did mention the difference in physical size between the Gen 1 Aluminum and the Nylon magazine, but as I've mentioned before, the later Nylon magazines were never the level of quality of the magazines that came out of the facility in Madison, Alabama and welded in my shop. That's not a design problem inasmuch as it was an induced problem by moving the tools to a facility that wasn't qualified to make magazines.
I've been told before, "I want to carelessly load my magazines," which forces me to ask, "well, what else about handling your firearm do you want to be or, are currently, careless about?" No one has ever answered that question. So, what I heard in the video was a reasonably informed shooter address an issue in a rather tender way when it comes to the care that's taken in properly loading a rimfire magazine. So much so, that he mentioned a loading tool and instructions that accompanied the Aluminum magazines.
And, while I'll never be guilty of trying to convince anyone that Zermatt did anything other than a great job with their magazine, it came after a number of years of experience of the legacy magazine that started this whole thing, being in the marketplace.
MB