OOO My Design.
Other than a cassette tape all you need to make it is a few nylon standoffs, or spacers. I used nylon bolts too. On the base I added an extra bolt to create a third foot for it to stand on.
A short length of leader tape is used to keep the case square. Tie one end and use one of the cassette screws to fix the other end.
An extra bolt to the right provides a third foot.