I knew I was going to try and make a couple of compartments so on one of my Spruce orders I ordered some piano hinge MS20257-1 which is the smallest they carry. Each side of the hinge is only 3/8 inch wide making a total of 3/4 width of the hinge. That really makes it better for these little compartments rather than the larger wider hinge.
So I located, drilled, and then riveted the hinge to the outer angle. Next was getting the door cut so I could attach the hinge to it and keep the process going. I rough cut the door and left it rough cut on the inboard side so I could mark the profile after attaching the hinge.