Nice work! The turrets are big for the scale you have, but it's difficult to have detailed turrets with that small scale. In terms of the detail of the turrets, excellent job! Secondly, the bridges are a bit too far apart. If you brought them down to 1 stud wide and pulled them closer together (the middle tier without the bridge should connect/touch the two), you may be able to fit those turrets on the side, where they should be. Otherwise, great job.