Abstract: Methods and apparatus for a stringed musical instrument, the instrument comprising an instrument body, a neck extending from the instrument body, a head, and a coupler having a bulkhead portion that adapts the shape of a portion of the neck to the shape of a portion of the head. A bulkhead portion of the coupler is adapted to be affixed to the neck in a permanent or temporary manner. The head can be attached to the neck via the coupler in a releasable manner. In some embodiments, a positioning key extends from the coupler bulkhead portion and the head includes a cavity adapted to receive the positioning key.

Abstract: A crane control system including a control module configured to interface with a crane control system to intervene with crane movement to avoid a collision with an obstacle, plans stored in memory for use by the control module representing vertical elevation or elevation ranges of a job site and identifying obstacles, a plurality of crane configurations stored in memory, and a display interface displaying a selected plan, crane configuration and real-time crane position. A method for controlling crane movement to avoid a collision with an obstacle.