20 x 17mm Paint stand again

This thing was made with Tinkercad. Edit it online https://www.tinkercad.com/things/eNeAzRUJWvc

This is I hope the final version. I have gone back in so many times to tweak things.

I have sliced with Simplify 3D.

You need to Duplicate and mirror the side panel to get a left & right side which I do in Simplify 3D.