This might sound like I need to get a life. But I am interested in the Scottish military regiments, and have a collection of regimental post cards. I want to mount these into a big frame, behind glass. But, how do I mount them? I don't want to use tape, glue etc. I also want to have extra space, for when I order more. I thought about using some thin wood, making little "rails" inside my frame, where I could slide the post cards in. I don't know, though. They look great, I want to show them off. Help.