IoT experimentation, midi pipe organ pedals and remote controlled passive XLR summer

Argh! Any chance you can send them the screenshot and ask them what went wrong? they might redo it?

Is that aluminium? I guess if it did cut all the way through, the middle of the 'a'/'o'/'e'/etc would have fallen out?

You could:

• Sand down the opposite side so it was thinner and the engraving went right through (probably too much work on Aluminium!)
  
• Drill a few holes so you know where stuff is, and grind through with a dremel from the opposite side. It wouldn't matter so much about how accurate you were, because you'd still see the nice front cut. If you did it right you could even leave small areas intact, so the middle of the letters stayed in place.