Thanks, Bob, but I don’t have the muscle mass for that, these days, and most of my neighbors are older and more infirm than I am. I will continue to look for a solution that is plausible for me.
The problem, I think, is that the scores are not deep enough to do much more than just mark the spot.
So...
Right now I have Kinky Tail (ok, her official name per Mrs. NoC is Tessa - but she has a kink in the end of her tail thus gaining her nick-appellation) chasing some flavor of unseen bugthing around the room.
Or maybe it’s a microscopic space fleet...
It’s why I have a lot of junk in my junk collection. An ordinary metal hinge, for example, when it is not attached to a door, would make a marvelous “sandwich” for your bracket, and would allow a fine adjustment to the score mark.
But you may not have a metal hinge. I was counting on there being a car in the parking lot, though.
Also from my junk collection, a short piece of pipe that could fit over the metal to be broken. That would give you leverage.
But again, tools. You have to work with what you have, including muscles, tools, and how to improvise for missing components of this list.