Rekeyable lock assembly with blown cylinder protection

A method of rekeying a rekeyable lock cylinder, the method comprising the steps of:

• providing a rekeyable lock cylinder including a plug body with a keyway opening along a longitudinal axis and a rekeying feature, the plug body including a tool-receiving aperture, the rekeying feature including:
• a first wall and a second wall in a perpendicular arrangement, the first wall parallel to the keyway opening;
• and
• a first support and a second support, the first support forward of the second support relative to a plug face of the plug body, wherein the first support defines a first recess generally along the first wall and a second recess generally along the second wall, the first recess at least partially intersecting with the second recess;
• inserting a first key in a home position of the keyway opening;
• rotating the plug body from the home position to a first position by rotating the first key;
• inserting a tool in the tool-receiving aperture;
• removing the first key from the keyway opening;
• inserting a second key in the keyway opening, wherein at least a portion of the rekeying feature obstructs movement of the plug body so that rekeying of the lock cylinder is prevented until the second key is fully inserted into the keyway opening;
• and
• upon fully inserting the second key into the keyway opening, rotating the plug body away from the first position, thereby rekeying the rekeyable lock cylinder to the second key.