I'm planning on buying a canon eos 1v. I've recently fallen in love with skateboarding photography. The eos 1v can shoot up to 10fps and is an amazing film camera. Seeing as how skateboarding is obviously an action sport, my shooting times are limited by my inability to use shutter speeds fast enough to capture action at night. I've done some research and it seems as though the norm for the sport is to use sunpak 555 handle mount flashes. I would like to know how i would sync three or more of these flashes to the camera. I have no way of viewing one of these flashes in person and have little experience with handle mount flashes. Is it possible to sync 3 or more of these flashes? If so what accessories if any would i need to do this properly? any help would be appreciated greatly.