A flow sensor includes a mounting plate, bending plate, and a sensing assembly. A data link is connected to a carrier network to receive QR codes and other data. Each of the plurality of drives is configured to be controlled independently of the remaining plurality of concentrically-mounted drives. The relationship type is one of either a complement or a substitute. Surgical methods for the use of such reciprocating rasps are also disclosed. The measured residual frequency error is then used to adjust the frequencies of the carrier signals generated by the multiple frequency generation sources.