I just shoot a roll in cold weather. About 15F. Don’t know if that’s relevant, but the camera is back to room temp. Upon getting home, the rewind knob lock lever moves freely to end of travel instead of hitting some resistance in the 3200 area of the ASA knob. It seems like the spring/lever/knob assy has become detached somewhere. Now I can’t open the back. Which means I can’t get the rewind knob off either. Any advice is appreciated. I love my FE2, and this is the same feeling as having your keys locks in the car. (And the same temptation to reach for a brick). Thanks in advance.