My secret modding project was being held up by the lack of a metal part for the back of the machine. Two days ago, Bill (the gentleman making the part for me) came through. I have had some success with grinding and deburring, but I will need two brackets before I can finish the project. I can at least get started, however.
Once I finish with the metalworking, there have to be several holes drilled to attach the backplate to the chassis and to attach the motherboard and other components inside the box.
After that, I can begin assembly, as long as I don’t want to paint the rear panel.