Spool Shelf using 3/4" EMT & 8x10 Metal Shelf Brackets

I had been trying to come up with an inexpensive & useful shelf for holding plastic filament. While looking around my room, the shelf brackets I was using came to mind. Seemed like I could make a simple plastic bracket to mount on each one & install the brackets upside down. I put it above my door which is unseen until you walk into the room. I am pretty happy with it.
Here is the design & further info on thingiverse if anyone is interested.

Could it be rigged to drop water on an unsuspecting victim? April is coming…

That is pretty impressive, I would love to create that my own and thinking if how this one works on my current interiors that I have obtained at http://caldwells.com/, hope that this gives me good feature for the door.