I have a 3 monitor arm and the pressure on that small spot from that arm is flexing my desk so I have this to distribute the weight. In short, it only works because I stuffed a large piece of styrofoam between my desk and the metal plate. This slab should be much larger than it is, and the bottom should be larger as well. But that solved my post styrofoam problem and I'm sure others won't need as much support as me because I only have 4 screens (software developers in case you're wondering).
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