Is it ok to ask tech questions here? I'm new to polaroids and polanoid, but recently got my hands on a SX-70 which I'm already having lots of fun with. Yesterday I remembered that I have a polaroid back for my Mamyia RB67, found it, but have no clue what film to load or how to use it. I've searched for manuals online, but not much luck, so if any of you using a Mamiya RB 67 polariod back could give me some hints to get started I'd be grateful. Thanks.