Hi everyone, first post here. After having my p5 rev 4 for close to a year now, I'm noticing that the filter cutoff knob has slightly more give than when I bought it. This might be a silly question, but is it perfectly normal for knobs to "break in" a bit? Given that the cutoff knob gets a lot of attention, is it normal for it to turn, say, 10% easier than other knobs that don't get as much attention?