I printed my one using white ASA material using .3 mm layers in draft mode. If you care about precision and less visible lines, surely it is possible to print using more precise settings.
Printing time in my case was over 3 hours.
The author remixed this model.
Necessary adjustment made to fit and match junction connector available locally.
My cover is mounted using two-side tape, no need to make any holes for mounting screws. In case you may need them, it could be enough to use just two M3 screws and use two remaining holes for wood screws holding this to the wall.