I created this model to use the wasted space on top of my UPS battery. It's a good idea to have a UPS connected to your printer, that space on top of the battery is wasted. This tray hugs the battery, and is serves as another place to place the most frequently used tools. Unfortunately, it does need support as the floor of the shelf is long and the side panels must extend downward to wrap the battery and provide stability. I printed this one in PLA.