Cutting board holder for drying

Where do you put your cutting boards so they can dry after you washed them? We used to put them on a towel, but that does not let them dry very well, so they get moldy (black) over time.

This is better: it lets you dry three cutting boards while having them essentially stand on their corner. The contact surface between holder and board is minimal, so everything can dry. There's a little pan for run-off at the bottom.

We use it with boards up to 10" x 14". Wouldn't be surprised if it worked for even larger ones.

It was designed in OpenSCAD, plus Inkscape for the rounded part: original files are at https://github.com/jernst/openscad/tree/master/boardholder