Smoke detector bracket mount

The "pins" on my smoke detector bracket broke and I decided to design and print a new one. I found some here on thingiverse, but because I did not understand the measurements or there was no measurements at all I decided to make one myself.
I hope it is useful for someone.
Free for non-comercial personal use.
Consider make a donation if this was helpful for you.

NB! See the pdf-file for best understandable measurements.
Feel free to give a reply on how to improve this thing.

19.07.2019
Things to be fixed:
1. "pins" directing the wrong way
2. "brim"/outer edge a little too narrow
3. The "pins" could be widened a little
4. Text goin trough the whole body

02.10.2023
Fixed "pins" the right way
Narrowed the text 0.5mm

13.10.2023
Fixed the directions of the pins (again, yes)
Widened the brim by 0.5mm