A method for texturing substrate surfaces and a substrate product, such as for computer disk drives. Just prior to the current pointer register being updated, its contents are copied to the previous pointer register. One or more of the respective at least one front door is configured with door rail segments, such that the wall rail segments are coextensive with respective door rail segments, with a sliding gap extending between neighboring ends of a wall rail segment and a door rail segment, and defining together one or more sliding planes. Power conversion may be controlled using space vector modulation implemented, for example, by any of a variety of pulse width modulation schemes. The device is retro-fittable on existing wheel assemblies, and installation coverts an internal combustion vehicle to a hybrid with electric propulsion. By informing the sending device of the message data handling capabilities of the receiving device, the user of the sending device can select the message data to be transmitted to the receiving device on the basis of these capabilities.