The power button of a Meitav-Tec / Herouth thermostat control box in the office broke.
It was glued to the switch, which is now partially broken as well:



The repairman quoted the company $200 to replace the entire control box, but I suggested fixing it myself with 3D printing:


 

Printed with PLA at 0.3mm height.
Made it more sturdy because it's not actually connected to the blue button.
It works just fine: