Chester Champion v20 spindle encoder ring

[moskit]

Good afternoon all

I`m looking for some help with my Chester Champion v20 that I just bought.
On the spindle, there should be a detent ring which is missing on mine. I can 3d print new one but I don`t know how many grooves should the ring have.
This mill is nearly the same to a warco and many others therefore, can someone please picture or count the grooves on their mill so I can make new one?
(Sorry, the picture rotates on its own)
Thanks in advance.
Kris