Michael Kelly started from scratch when developing the 507X. Michael Kelly wanted to give the extended range players a feature-packed, great-sounding 7 string. Some of the major points of focus was on this awesome 7 string are the feel of the neck, increased access to the high frets, and enhanced sonic options. This attention to details created a 7-string that sounds terrific and feels natural and intuitive. The Rockfield SW7 pickups sounds great alone but Michael Kelly also incorporated the Great 8 wiring mod and push/pull pots for coil splitting, adding to the tonal possibilities of this awesome sounding 7 string guitar. Very cool satin black wash finish. Case sold separately.