Combination Safe (Letters)

I decided to mix it up a little bit and use letters instead of numbers on the rings. This makes it a bit more fun since you can spell out lots of different 5-letter words. You can also choose a combo that means something to you. There's still only 10 letters per wheel, so I strategically chose the letters to maximize the number of possible words. There's at least 80 words you can spell (that I've found), and there's probably much more than that.

I also included a blank ring in .stp format so that you can make your own custom ring in whatever CAD program you use.