A mandrel for building a tire is described having a torus shape. In response to a wager, the reels are rotated and stopped to randomly place symbols on the reels in visual association with a display area. A remote GPS subscription unit receives the key enablers for the subscription keys in service activation messages for the services for which they have subscribed and then uses the subscription keys to decrypt the GPS aiding information. A reward certificate is displayed in response to a request to redeem a reward, and user reward account information is synchronized with a web application. The overhead from the metathesis section deethanizer may be recycled to the ethylene plant recovery section. An optical limiter such as a two photon absorber can be used in conjunction with the R-FPSA, so that Q-switching is inhibited, resulting in laser output that is cw modelocked.