Update* 

Added v2 with the hooks the right way up. However, the other way is still holding strong. So, I'll let you choose which you want to print.

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I remixed Flowmage's Clamp Rack into a shelf, and it works great. The flat area is roughly 78mm deep by 118mm wide. I don't know the max weight it is capable of holding, but it's great for getting small things up and out of the way.

I printed with only a 5-count brim, but I don't even think that was necessary for my printer. Your results may vary.