The 520 is carefully assembled in the same hand-carved workshop that gave birth to the LM-400 and 700, and have similar hand-carved, fully graduated spruce tops. The solid maple back of each instrument is also hand carved, and the solid maple sides complete the package. The maple neck has a comfortable rounded V profile finished with a rosewood fretboard. The compensated adjustable ebony bridge and high quality vintage-style Grover tuning machines insure that these mandolins have great intonation and stay in tune no matter how hard they are played.