@rauliruegas . you are right, an anecdote does not a study make. Yes, the VM sounded surprisingly good with the tonearm's -ss way up in the air. It is not the only AT cartridge I have examined that was not satisfactory. Perhaps the more expensive cartridges are better, but what does that say about the manufacturer? As you noted it is the way the manufacturer handles the problem that counts. Most people who buy inexpensive cartridges have no idea how to set up a cartridge and usually leave that up to the dealer. The bad cartridges go unnoticed. Then there are nutbags like me who examine every nick and cranny they can get into. It is said there are only two or three manufacturers of cantilever stylus assemblies. There are way more categories of fit and finish and it is very obvious that the more expensive cartridges are getting better units, much better units. There are a few exceptions and the Goldring 1042 is one of them. I have not examined a Nag Mp-500 but I suspect it is one of them also from pictures I have seen.
Any manufacturer that lets a cartridge loose in that condition de facto has a QC problem. I'm not saying ATs are bad cartridges. The designers do not make them. You do have to be careful when you buy one and make sure everything lines up correctly.