The present disclosure relates to three-wheeled vehicles. The method comprising the steps of moving the parts on the belt into a chamber of the furnace, heating the parts, igniting the unused combustible atmosphere above the parts, and allowing the atmosphere above the parts to escape through a vent in the chamber. A track density can be reduced for a given hard disk drive capacity, or alternatively the hard disk drive capacity can be maximized for a given track density. The mounting studs have lock surfaces that are engageable with the spaced locking surfaces of the positioning structure to enable the elongated mounting studs to be selectively fixed relative to the positioning structure at desired predetermined distances from the axis.