For sure the old Vari-X II scopes are reliable. "Woodpecker lips" is quite accurate.
I found that in adjusting during sight-in that if I needed to go, say, four marks, I'd go six, go back three, and then "ooch" the last bit of adjustment. Then lightly tap the scope with a screwdriver handle. No idea why, but it worked. Since it worked, I never worried about it. My deal with any hunting scope is to set it and forget it.