This is a 3D model showing a closeup of the cutout in the aluminum that allows us to slide the plastic 2 liter bottles in and out of the supporting bracket.

Notice the hole directly to the right of the U shaped notch (on the same surface) as this is where we will be putting the threaded rod through, to support each layer of farm fountain.

The holes for the threaded rod are .25 inches. The U Shaped notch is 1.04 inches wide and 1.20 inches deep.
The angle aluminum is 1.5 inches wide by 4 feet long.