cable tray for a wire rack shelf

My 3d printer sits on a wire rack cart.
I have made a bunch of stuff to hang my tools and things from this cart.
I remixed the cable tray then remixed it again.
I added my own supports to the rail clips so they print nice. Cut off the supports post print.

Now I have 4, 2, and a 1 finger section of cable tray that will clip onto the front of my wire rack shelf.

The front rails measure 27mm outside measurement. The wires that make up the shelf are 20mm's on center.

I printed these w