I had my Fractal Design R6 power button act up - the power button would not turn the pc on. The culprit were hooks that broke and the switch was loose.
This 4-minute print solved the issue - i used the oryginal screws that hold the power button assembly in place to hold the power switch from the bottom - the two black screws visible in the photo holding the white power button assembly. The screws are tight but they will not destroy the print.
The author marked this model as their own original creation.