The Martin Carthy 00018 model has a zerro fret ( something martin was loth to do ) but the guitar is very nice to play !!! . It also came with heaveier strings due to playing in open tunings . ( Carthy plays with the base string down to C) Heaveir strings tuned up are pulled tighter and so are harder to push down . Along those lines<><><><> For the fun of it some time try a set of light strings instead of your ex-light and tune down a whole note to get easeir playing .Also Your are having an easier time at the third fred because you are getting away from the peghead nut . tuned down and capoed at the second fret will also help make the instroment easier to play till you get more used to it .. All the best ,
          Myself I love higher action for concert work . Sounding an instroment takes on another demention when you think of filling a room and connecting with that couple in the back row who are still chatting each other up . All the best , guy