If your misaligned key is located only on the foot joint: skip ahead to step 20 to avoid unnecessary disassembly.

For repairing a key located on the body: follow the proceeding steps until you've successfully disassembled the key of interest. There is no need to disassemble the flute any further, so follow the guide as far as necessary and then, skip ahead to either step 20 (if a key in the foot joint needs fixing) or step 22.