Never ever play with the lsn... especially if you dont really know what your doing and if it was new why was he messing with the lsn? It comes set properly from the factory lsn is very hard to fine tune i would watch ali's pinch test video on youtube that seems to be the best guide i can find on setting the lsn. http://www.youtube.com/watch?v=Y8T8SDQ1hGI