Desk/bench gap catch

I dropped something behind my bench and I really hate trying to get things out from under it. Later, I figured I could design something to catch what I dropped. This is what I came up with. A part that goes to the wall and some … fins … to make it stiff. Then, a screw to adjust the fit so I didn't have to make a design for every place I wanted to use this. I had to make 2.One for gaps ~45 to ~55mmAnother for gaps between ~55 to ~90mmI didn't design them to really hold weight or not scrat