Various embodiments and methods relating to a media bed are disclosed. In some embodiments, the axial dimension of the track-engaging surfaces of the drive members is at least 50% greater than the axial dimension of the track lugs. Thus, the control system and method permit adequate operations of the vehicle-occupant protecting devices depending upon the rollover state of the vehicle. Accordingly, the power which is not radiated from the slot antenna but remains in it decreases, so that the reflected power from the slot antenna decreases. The support is cantilever supported on the tray by a pivot connection for defining the first axis and includes a bearing surface selectively engageable with an upwardly facing, arculate surface portions of the tray for providing vertical support for the mouse surface remotely of the first axis. The variety successfully propagates from softwood cuttings and is suitable for year-round production in commercial glasshouses.