An adjustable crank shaft for a pump or engine allows the stroke of the piston to be varied. In some embodiments, the method includes receiving, from a geographic information system client device, geographical coordinates of a viewable extent of the GIS client device. The separated fat component can then be injected into a selected body portion of the patient. The sled is positioned by a sled motor and the head is positionally mounted on the sled. The touch may be a first touch received in a particular input region of a GUI displayed on a touch surface.