A nodal-mounted spring arrangement for an electronic toothbrush includes a V-shaped spring member secured at both ends so that it can operate in out-of-phase torsion mode along the axial dimension thereof. A mounting plate is connected between a node point along the V-shaped spring member and the housing of the toothbrush. A nodal assembly comprises a diamond shaped or round insert having an upper surface configured generally to fit flush with the lower surface of the V-shaped spring member, a V block shaped or flat shim member which is configured to mate the upper surface of the V-shaped spring member and the node spring, and an attachment member, such as a screw and nut combination, which tightly connects the mounting plate, the shim, the V-shaped spring member and the insert.
