"Hidden" Objective Markers with ABC/123 Labels and Covers

Pretty much stolen from another thing. I wanted more labels though. These are a pretty cool idea, put the ? cover on it, mix them up & place them. You can grab more letters and put them on the blanks, I uploaded the alphabet A-Z and numbers 0-9 separately.
Great for gaming, wargames, strategy games, etc.
They seem to print out just over 30mm, ~32mm so if you need smaller I guess shrink them. The originals were 4x bigger when I tried to import them in sketchup, I assume I did something strange.
Off-topic: If you haven't seen our full-size working Lego R2-D2, check out http://L3-G0.blogspot.com or http://youtube.com/myL3G0