Review on Adjustable Speaker Wall Mount for SONOS One, One SL and Play:1 - Mount Plus SB631-Pair, Low-Profile, Adjustable Tilt, Swivel, Rotate Speaker Mount for Optimal Audio (2 Pack, Black) by Sean Purnomo

I will post a photo tomorrow to better show what I will mention. There are no words in the installation instructions, only pictures. The first step shows the screwdriver entering the point and pressing on the area where there is no screw. After strong pulling and pushing, a blow is believed to occur to separate the two pieces. Well, with a screwdriver I broke the damper. You will need this flap to remove the speaker from its mount. Pretty disappointed. Try to decide if it works, return the problem. Otherwise the mount is exactly what I want. You just need to use something else flat and be careful when installing it. I wish the valve was a little more user friendly and the instructions were MUCH clearer.