This bone marrow extraction tool comprises an outer cannula having an interiorly and exteriorly tapered marrow-receiving distal end, and an inner cannula slidably disposed in the outer cannula and having a distal end formed with diametrically opposed narrow and wide longitudinal slots to define resilient sectors. An exemplary vehicle fuel system includes a first fuel tank including a first pressure sensor, and a second fuel tank. A processor operates based on encrypted inputs and produces encrypted outputs. The primary settling unit includes means for providing aeration. The system compares the automatically generated antenna configuration information with the user-generated driving sequence information, and if there is an inconsistency in the setting of the both, generates an antenna rewiring procedure so as to resolve the inconsistency. Each horizontal loop can include a plurality of downwardly depending hooks.