Alex uses this mailbox as an example (DIY Mailbox - Album on Imgur
) although it seems to have been built by someone else. I suspect that had Alex really made this mailbox and really had a magic cnc wood carving machine, he would have used the machine to "flush" the numbers into the wood for a very cool appearance. What further evidence is required?! Sadly, the machine is a great idea and technically -- for hobby grade accuracy -- well within reality. It's just too bad someone hasn't taken the time to do one for real.