This Magnetized tracker with numbers from 1 to 15 was designed for Kill Team. I have added a no logo version for generic use.

 
Magnets:

You will need 2 magnets 10x1mm for this tracker. Holes where made 0,1mm larger to easily facilitate the magnets, for all users. 

I suggest activating “Auto circle contour-hole compensation” in Bambu Studio under Quality, if you are struggling with a good fit. 
 

Sticks well together and does not easily slide to another number by mistake.
 

You will get the best result with a 0,2mm nozzle due to the fine details of numbers and logo. 

23-05-2025

Added tracker bottom with indented numbers by request. I havent testprinted it yet!

 
Also i have printed quite a few of the original trackers with 0.4 mm nozzle, with a decent result. Logo is still very nice, numbers are readable but not as sharp as with 0,2 mm Nozzle. 

Enjoy

/Henrik