Printed with 0.3333mm layer height and 0.4mm nozzle (works best for my fast prints).
In the picture you see the first version with the letters inside the walls which worked not too well. Updated here to be at the outside to overcome this problem.
I also added a version with holes at the bottom because it's seems quite popular.
The author remixed this model.
Smaller wall width than the original from @Nodashi and therefor less material and much faster print time.