The box, prior to being assembled, along with the little brackets I made to rivet it together

Shaping the hole for the power cord receptacle using the sheet metal nibbler

The power cord receptacle inside the newly-nibbled hole: it fits!

As we can see from the front view, the lip covers up any parts where the hole was wider than it 'needed' to be.

This is the way to clamp the workpiece to the table... if you're an idiot. Putting the clamp directly on the back -- on the visible side, no less! -- will leave a distinct ugly impression in the soft aluminum.

A much better way to clamp the workpiece. The wood spreads out the force of the clamp, putting much less pressure on the aluminum surface. The visible face is also better protected.

Riveting the brackets to the newly-drilled holes, in the clamped workpiece.

The two halves of the box held together after cutting. They match pretty well, particularly along the sides.

All the brackets are now in place for the back of the box!

An outside view of the newly assembled box. Looks pretty good from this angle!

The inside of the box: maybe a little rough-looking, but solidly put together.

A sneak preview of how a lot of the major components are likely to end up looking.