I want to build a waist level finder -- something that I can attach to the hot shoe mount, for example, of one of many cheap 35mm cameras that I have (my Smena 8M for instance). How hard a project might this be? Really, I don't want to make one. If there's something that exists already that can be adapted or modified for such purposes, that would be better. Any ideas? It doesn't have to be perfect. For the type of street photography I do, I want something that just gives me a rough estimate of where the camera is aimed. Or maybe there's a camera that I missed. Has to be small and snappy though. TLR's are too big; my Yashica T5 has a WLF, but the shutter lag is interminable. Thanks!