3D Printing Screen Clips

My friend G. was unable to find replacement plastic clips that hold a window screen in place, so I offered to fabricate some on my 3D printer.

I made the model in Tinkercad; the hardest part to figure out was how to make the short edges rounded.

As 3D models go they were super-quick to print, at about 8 minutes each

On the left is the original that I worked from; in the middle is my first attempt, and on the right is my second.