Standard european round socket boxes are too small to fit Xiaomi Aquara switch. It is possible to order special 'chineese size' 86mm boxes on ebay, but they require too big hole and hard to mount accurately into existing interior.

So I designed something in between - big enough to fit Xiaomi Aquara switch, but not as big as 86mm boxes so that I can hide the box underneath the switch. It was possible to keep wallpapers outside the box untouched.

Basically ABS is not the best material for power boxes, but more or less ok considering the switch and relay inside has their own case. Nylon will probably ok as well, while PLA is not good for this thing (too low melting temperature)

Note: I slightly improved the model comparing with shown on pictures. Particularly when mounting I realized that breakable holes should be closer to box bottom.