Finaly a NGD I have been looking at Martins for a long time and finaly found a used one for a reasonable price. First of all it sounds wonderful. I almost cant believe how much better than almost any acoustic I have played so far. The action needs to be altered tough since the strings are too high for me. The wood looks (and smells) beautiful. The obly two things I noticed are that I can feel a little unevenness in the body behind the bridge. Is this normal? Also on the bottom, there is this line that I don‘t see on online pictures of the guitar. Should I be worried?