In an attempt to rehabilitate my much-neglected rather dim-focussing Flexaret VI, I have ordered a replacement focus screen from Rick Oleson. The procedure to remove the viewing assembly is illustrated here. However, on my model the screw recessed below the hole marked "Turn wind knob to clear linkage..." in the linked diagram above is thoroughly stuck (I have wound the knob so that the linkage is not obscuring the hole). The other screws came out OK with minimal effort. Any ideas on what I can try to get this screw loose without disassembling the whole camera (the front of the camera doesn't come off unless the taking lens/shutter assembly is removed, and then basically the viewing lens followed by the rest of the bits and pieces are also removed)? The challenge is the holes in the front to access the recessed screws are fairly small - I'm using a size 3.0 slotted (flathead) screwdriver to remove the screws, and it *just* fits into the holes. I checked a couple of hardware stores, and I haven't seen any impact screwdrivers that small. All suggestions appreciated. Thanks!