A device for winding a length of wire into one or more flat coils, with the device having a winding component onto which the wire is wound, a wire guide to contain the coils of the wire into a single width flat coil, and a drive engagement component adapted to be engaged by a drive means such that the drive means operates the winding component of the device. The differential driver includes an anode transistor configured to connect to a diode anode. The outcoupling grating couples light out of the waveguide normal to the surface if the grating spacings are equal to an integer number of wavelengths of the light within the cavity. The crown portion has a major crown portion and a minor crown portion, the major portion having greater surface area than the minor portion, and the major portion being displaced vertically lower relative to the minor crown portion. The front body portion is sized and configured to have a length sufficient to extend down and be draped over a thigh area of the person, and has extended side portions configured for draping over each side of the person’s body from proximately a waist area of the person down to the thigh area of the person. Implant identification information designating a type of the medical implant is on the card.