My first disassembly and as luck would have it, I think I have a cross threaded screw. I believe this is a setting lever screw. I noticed when putting the driver blade to the screw head it was in rough shape and I can't get my driver to take to the screw slot. It just slips out without the screw turning at all. Even if I could get my driver blade to stay on the head, I'm afraid to increase the pressure here and afraid this may be a steep learning curve. Any advise would be greatly appreciated.