I was surprised to find that when I torqued down my Dove roller rockers certain rockers would sort of "bind" against their side stop.
Not much, subtle, but you could feel the difference in how one rocker "rocked" real smooth with no load on it, and the next one or so felt a little bit "tighter". Paying close attention to the torque wrench and the exact position of the rocker while tightening made them all "rock on" nicely.
Ball and cup guy.
For what it's worth...