The patented tuner /bridge module is a body mounted tuning system that replaces tuning keys on the head. This is what makes the bass absolutely not head heavy. To install a string, place the ball end into a bronze cup in the head of the neck. The tail end is then inserted into a hole in a wheel in the bridge. Bend the string towards the neck and roll the wheel by hand to ratchet up all the excess string. The tuning knob can then be rotated to tune the string to pitch. The tuning knob glides on a ball bearing and tunes at an 80 to 1 ratio. Removing a string involves loosening the tuning knob till the string is loose, then pressing down on the ratchet spring head allowing the wheel to rotate in the opposite direction as the string is pulled off.
