I printed mine using a 0.8mm nozzle and 0.4mm layer height and no supports at all, which seems to come out just fine. As you can see, there are some bridges that would probably be of better quality when using supports.
I don't care about the overhangs, my gas bottle holder will be mounted under the sink, nobody will see it at all. :-)
The author remixed this model.
Moved the screw holes to the existing structure to save filament and print time. @thonem21 already made a v2 of his original model to fit the smaller printbed of e.g. a Prusa MK3/MK4.