I saw a video (https://www.youtube.com/watch?v=4iB7kkCy1xM&t=160s https://www.youtube.com/watch?v=4iB7kkCy1xM&t=160s) on EDM machining and the tolerances were m

I saw a video (https://www.youtube.com/watch?v=4iB7kkCy1xM&t=160s https://www.youtube.com/watch?v=4iB7kkCy1xM&t=160s) on EDM machining and the tolerances were magnificently tight. I had since wondered if such techniques would work for building a "one-move" Lemarchand Box (Hellraiser), assuming that engraving various designs would utterly obscure the actually disjoint pieces. I am not sure what steel you would need. Something dimensionally stable, to be sure.