I have here a Nikkormat, and the repair manual. I've disaseembled and repaired various problems on these things.On this one, I want to go directly to the shutter. And I don't want to do more disassembly than necessary. To remove the mirror box, is it possible to pull the whole thing complete with pentaprism, metering assembly, shutter dial and lens mount? The whole kit and kaboodle all at once and simply lift it free. Is this possible? Or do I have to do the tedious complete stripdown? Thanks.