A magnetic head mechanism includes head support bases which are provided on a head carriage and a head arm. A method for producing a crimped carbon fiber, comprising contacting a carbon source andor a catalyst source with a sulfur source in a heating zone to produce a vapor grown carbon fiber, wherein the ratio of the molar number of sulfur atom in the sulfur source to the molar number of the catalyst metal atom is 2. The design allows a load such as a large electrical or telephone box to be transported and unloaded by a single operator. Each of the distributed power optimizers capable of operating in either pass-through mode without local maximum-power-point tracking or switching mode with local maximum-power-point tracking and having at least one associated bypass switch for distributed shade management.