I am trying to mount a Schneider 120 Super Symmar HM to the lens board. The problem I am having is there are 4 screws on the back of the lens that contact the lens board. Three are Phillips screws that secure parts of the rear lens together and they all fit flush to the back of the lens. The fourth screw is a flat head screw that has a flat notch cut on one side. This screw seems to hold nothing together and does not fit flush to the back of the lens like the other screws. Accordingly, this protruding screw will not allow the lens to seat flat against the board. As a newbie having the lens not fit flush against the board does not seem right?
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