You can simply print this model using PETG (more durable than PLA) and TPU. TPU is very useful to completely absorb vibration from Sonos diffuser. The diffuser is entirely supported by TPU. Maybe is a good idea increase fill density in the mount hole (I've used 70%) and 20% for the entire support.
I've spent many time to design perfect elements that firmly fit into the Sonos One 2th Gen (because other I found are not perfect), feel free to adapt this model to your wall mount or your need.
Send me comments if you print or adapt this model!
Source Fusion 360 file attached :)
The author marked this model as their own original creation.