Reply to Colored knobs from djtechtools store

I dont know if its just me or the knobs I received.. but the black inserts all needed to be superglued back onto the knob. Dont get me wrong.. they are awesome.. changes the speed I can access things.. color coding fx sends and level knobs on all my gear... xone 92, xone 2d, electribes etc.
So I was wondering if people are doing the same thing, or not having any issues with them falling out or caring if they do.

Edit-Im not referring to the plastic insert on the bottom of the knob which allows you get the right position... Im reffering to the black strip line going down the button... sorry for any confusion

I really wish a set of UV orange and blue knobs and x faders were available. Id buy 3 of each if they were