I needed a practical clapboard and writing on a printed surface seemed unpractical so I remixed the original model to a blank one and I'm going to use sticky-notes on it.
Please, see the original for hints how to print, some supports are needed.
I'm uploading a .3mf project file with supports added and one color change. Exactly the file that produced the board on the photo.
The author remixed this model.
Removed markings / lettering from the slate.