For all the watch guys here, Im thinking about picking up a JSAR Gen2. Im debating wether or not to get the stainless bracelet with it. I do a lot of diving so Im back and forth between the bracelet from Marathon, an Isofrane strap, or a strap from Sinn. Does anybody know if I need a special wrench to change the bracelet myself? Could any watch shop put the strap on for me?