A pumped-fiber laser comprising a multimode doped fiber and a holographic spatial mode conversion device. The structure provides improved weight distribution for better balance, additional strength and stability to clubhead and provides more effective aerodynamic surfaces to increase clubhead speed. The RS-DVR carries out a number of functions and operations to service multiple subscribers and associated subscriber systems, such as various storage device management operations, file structure techniques, assignment of recorded media to subscribers, file system indexing, and supporting shared and per-subscriber content rights. The write sequence writes concurrently to at least a subset of the plurality of MRAM cells corresponding to the first subset of bits having the first polarity, then subsequently writes concurrently to a remaining subset of the plurality of MRAM cells corresponding to the second subset of bits having the second polarity. A resonant body transistor is also disclosed.