Next, I made two jigs to cut the shelf to fit the angle iron. The first was to get the angles which were transfered to a second jig used to guide a saw with a metal cutting blade.
I decided to bolt the tray to the angle iron so in the future I can replace the tray if need be. To get the holes right I drilled small pilot holes in the angle iron first and then from underneath drilled up though the shelf. I then drilled all holes to size. Raz