An optical aiming device for aiming a shot gun which upon firing a shot provides a shot pattern, the optical aiming device comprises a base part having a longitudinal extension, a distal and proximal end and including means for attaching the aiming device to the shot gun. A serving base station transmits a handover request message to a base station controller in response to a handover request of a mobile station. The subscriber units can forward context-determinative data and information to a service provider which can vicariously use the equipment or devices in the area via the subscriber device. These methods include non-stochastic polynucleotide site-saturation mutagenesis and non-stochastic polynucleotide reassembly.