A robust spindle motor is provided having improved shock resistance for fluid containment, as well as enhanced air purging characteristics. The availability of this cDNA permits the retrieval of DNAs encoding homologous receptors in other insects and organisms as well as the design of assays for the cytotoxicity and binding affinity of potential pesticides and the development of methods to manipulate natural andor introduced homologous receptors and, thus, to destroy target cells, tissues andor organisms. The insert is designed for locking of transverse tuberosity bone screws in the same way as a cross-dowel-nut.