From your post I am not sure if you have the Simplisafe system, but the screws seem so small to really bite into the drywall, which is why I was thinking the small anchors. I do not like to put any holes in walls, but then, I do not want things falling off the wall.
My though is the tape would fail over time because the finger pressure used to activate the keys may play havoc with the tape’s adhesive.
I thought I was pretty clear in #19, I own it. Have for a couple years and moved it with us to a new home. SimpliSafe even offers additional tape pieces for re-mounting.
I've described the mounting, here's a picture. The control pad lifts off the mounting plate, is portable. The buttons on the keypad are a sort of 'soft touch', not a hard click, do not require much pressure to activate. The concerns you've expressed about this base mounting are baseless. You also seem to be saying you don't want to mar a surface, but then speak of drywall anchors. But maybe I'm co-mingling your remarks with others'.
If you or anyone else has any questions about use or operation, I'll try to answer them. I own the system, I use it, I like it for what it is and provides. It's a good value. And its internet connectivity has been useful to us many times as we've frequently been out of town.
I've got door sensors, glass break, motion, wired cameras, integrated smoke alarms.
They're offering wireless cameras now, and they also have wireless deadbolt actuators which are very interesting.
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