Catapult
thingiverse
I came across several identical layouts that didn't impress me, so I chose to create something of my own. It functions seamlessly and has held up remarkably well so far. To ensure its stability, I strongly recommend using glue as a bonding agent.
Download Model from thingiverse
With this file you will be able to print Catapult with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Catapult.