I will be installing my UR crank pulley soon and I'm looking for info on which belts to use. Are the ones listed on the UR website pretty accurate or has anyone found better sizes? The site sounds kind of unsure as to whether the listed belt sizes will be the correct ones. Also, what are some sizes in other brand belts rather than the Gates ones? How is pricing on these belts. It seems that theres a lot of adjustment room for the stock belts - can they be reused? I'm only looking for the AC and alternator belts.