A compact, portable device for effectively locking a crank window in a user selected position. The support bracket supports a reflective element assembly and is attached to the twin-arm assembly through a pair of integral bearings which translate along the arms to extend or retract the reflective element assembly. The use of complex coefficients and of the complex multipliers allows compensation both for AMAM distortion and for AMPM distortion in an amplifier device connected downstream of the predistortion unit. A tag event process evaluates the event records and calculates actual dispensation rates that self-calibrate for a number of potential dispensation variances. In a particular aspect, the common source is an animal carcass. The service request communicated from the wireless handset requests the separate wireless handset have temporary access to the first service.