Shortly after starting to bend, miter, and fit up tubes I found a shortcoming of the fixture. Keeping the left and right sides of the rack aligned and parallel would not be easy to do by eye. I added an extension to the rear that should make building the rest of it smoother.
Below is the start of the rack, before I added to the fixture.
Here is the addition to it. Getting the rest of the rack built should be pretty straight forward. Hopefully.