This is a remix of my Fusion 360 design. I used OpenSCAD to make it more customizable.

I solved what I considered a moderately difficult problem - rounding all of the exposed edges. This is easily done in Fusion 360 with fillets - a little more experimenting was needed for OpenSCAD. My solution works, but changing the rounding radius will result in a recalculation delay.

I created this code using Visual Studio Code and the OpenSCAD extension as the editor in OpenSCAD is not very robust.