Reply to Looking 4 info DIY jogwheels

hello,
i look for a few month about how to diy a jog wheels, if someone have info for that, it s gonna be very kind.
i saw the project from e classik. He talk about encoder sheet for Jog but i don't understand how it work proprely.
I saw also test with mouses, but it's kind of amateur way i believe. i look for something sur like the Kontrol s 4 but make bigger jog.( i have Ks4) there is 4 zone in this jog but never demontate the KS4 to see inside.
did someone have some info for me?
regards
fred