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Not a troll. I had these on for months and saw my print quality over those months. Took them off and changed nothing else and saw an instant and dramatic increase in print quality. Why? I have no idea. I also don't really care enough to analyze the physics. It makes sense that these would improve print quality. That's why I printed them and used them for so long. From my observations, however, they don't. If someone wants to do a full-fledged analysis of the physics or even a more thorough comparison of print quality with and without them I'd be interested in seeing the results. YMMV, but this was my experience.