As the title, I've got a Hormann garage door fitted but the previous owners of the property appear to have lost the key! Access to the garage is ok via a side door, but I'd really like to replace the lock barrel with a new one (complete with keys). I know that normally it's a case of removing the securing screw, use an existing key to turn the lock slightly so the cam is aligned and then remove the whole unit, but I have no key for step 2. Would a key from another Hormann door provide enough 'turn' to align the cam or is it a locksmith job? Thanks in advance for any positive reponses.