I am new also and it took me twice as long since I didn't know which mark to use to set up my latitude on the DG-240 motor. I felt stupid and now want others to know where to look for the mark on the motor on each side. By the way for anyone reading this message it is where the two parts of the outer motor comes together and it is a knotch on each side of the motor. I was using the bolt at first to alien the settings.