I wanted to have an alarm attached to the printer. I keep https://www.amazon.com/Kidde-Battery-Operated-Ionization-sensor-Compact/dp/B00PC5SZLO/ on hand for when I'm working on boats, carry it along, and if something catches fire, I have a very loud alert that doesn't rely on me smelling smoke through my dust mask. It's battery operated and fits neatly into my fire sense bracket. It's another step towards a safer 3D printer.

Creality

Ender 3

No

.15 or .12

10% minimum

Print it flat. The holes are made for M5 screws. You may need to heat up a screw and press it into the counter bore so it will sit flat.