at 2.8 it reacts much more quickly/noticeably to adjusting the focus. I had it set to f11 above, so I guess it should be expected that it wouldnt react to focus very quickly. However, I might have misunderstood about backlash. I thought it was the de-synching of the gears so to speak, the dead space, when adjusting the focus. Mine has no slop, no dead area (at least nothing noticeable) when adjusting focus.
Yes that is what is meant.