Fast Fourier Transform based Phase Lock Loops are provided for use in navigational signal receivers. The calibrator is simple to use, making it suitable for home use by individuals regardless of medical or technical skill level. The vehicle shock absorber is formed hollow by blow-molding thermoplastic plastic. In one embodiment, one or more of the player selectable values are progressive award values. During the validity period of such a license, the client device requests a \u201cnormal\u201d or \u201cregular\u201d license to continue accessing the title after the fast-expiring license expires. If the authorization code is present, control of the domain by the user is established.