A method of previewing the effects of flattening transparency is provided. A steel shaft can have a titanium-containing end piece mechanically joined to the end of the shaft, and the end piece can be directly electron-beam welded to the wheel. A control unit monitors and compares transitions of the signals to more accurately determine direction of movement for the object. The text list display control unit controls to display the texts as a list. A drive system vertically adjusts the coil plate assemblies in a descending manner in which the free falling rings encircling the mandrel are initially accumulated on the upper coil plate assembly before being transferred onto the lower coil plate assembly. Each of the curb members also present a surface to underlie the lip of the curb and engage it if the base portion is lifted.