Hi everyone!

With kindly support from @Cédric Heckly I've made a modification to his improved WCU-4 rings holder. It can store up to 3 rings (good for pre-marked rings, I've never used more than 3 anyway) and can be attached to a robocup with 2 zip ties.

Feel free to use, share and print ;-)

Prusa printers (best is to download pre-sliced 3MF) :

https://www.prusaprinters.org/cs/prints/130945-wcu-4-marking-rings-holder-for-robocup

and Thingiverse:

https://www.thingiverse.com/thing:5236997

Enjoy!