Needs better support for Wheels

I first thought the wheels were the problem - but it is really what you screw the wheels into that doesn't hold - it is a black plastic accordion type of holder that slowly comes out and thus the wheels start pulling away - they need to fix that problem. I ended up just putting some plastic movers sliders under it to slide/move the shelf around. I left the black plastic piece that you would screw the wheels into and just put them on top of the sliders.

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