E27 lightbulb holder/wall bracket

In my work I'm replacing a lot of bulbs. I like to have order in my car though. That's why I've designed this wall mount. It holds 9 bulbs, requiring a build plate of 30x30 cm.
The image is of a first version - current version in thinner, in order to save on print time and filament.
This is a remix of a different project - someone did a E27 and E14 screw mount, I've only adapted it into a wall bracket. I cannot find it though...
Printing suggestions:
Layer height - 0,16 or 0,2 mm
Infill - zigzag - the fastest, or gyroid - the strongest, 10-15 %
solid layers - 3 or 4
supports - not required (can enable them for top of the E and 7 letters, as those can sag),