Vex Project Numbers

I teach using the Vex EDR system and last year, I ran into a recurring problem. Students would occasionally "accidentally" grab the wrong project and start working on it as if it were their own. To combat this, I tried using "parking spots" but they still got mixed up. Post-its don't stick, dry erase markers are hard to remove after being left on too long... But then I was like, "Oh, yeah." I have a 3D printer.
I found this great model of a lock bar, modded the mesh, and added some numbers. Also thought it might be a great way to label projects for exhibits.
There's a blank one included. You can drop it into Tinkercad to easily add text.

Suggestion: Print on light colored filament and use a sharpie on the numbers.