Whats exerted force?
Unfortunately, when you have a body at the end of a level, what you compute is not force, but torque. The force that is acting to pull the anchor out of the wall is also torque, but the device is rated for force, not torque. I’m not a good enough physicist to say much more. Regarding the wall as a whole: if each individual cup is securely held, then the strain on the wall is no more than if they were attached directly to the wall. This is a bit of a simplification but it’s going to be true because the size of the wall that is covered is much larger than the size of the lever. I’d like to propose a practical solution: mount a piece of painted plywood or fiberboard (1/2″ or even 3/8″ would probably be fine) to the wall that is larger than the area you wish to cover, and attach this through the studs, which are the strongest part of the wall. Attach the levers that the cups will be on to this board, and the connection will be much stronger than a drywall anchor, plus the load will be supp
