i put the string on the.... line? fold? well joint under the fingerprint pad and even then i can be on the pad sometimes. my hands dont callous well and no matter how much i work with them, how many blisters i get, how many times i shoot a bow, rock climb on sandstone, workout, flintknapp, my hands just dont callous, so i keep the contact the string has to my hand minimal so i don't get blisters.
i sometimes have had trouble with pluck but then i realize if i make my finger go limp, and pull or follow through at the same time and make sure to basically roll the tips of my fingers across the string than the string rolling across my fingers then i dont have any trouble. sorry if you didnt quite get what i ment. im pretty bad at explaining.