Eduard has come out with several photo etch sets for the 1/200 Scale, Merit, USS Hornet CV-8 (kit# 62001) and this is one of them. Part 5 provides detail parts to upgrade the 5 inch main guns and the Quad 1.1 inch guns.
For the 5 inchers, there are new man rails, gun sights, seats and elevation and training wheels. You also get new mount stands. For the 1.1 inchers you get detailing for the breeches, sights, seats and a new floor for the gun tub.
Assembly is straight forward but a tad fiddly. There are a bunch of tiny parts that need to be bent and shaped. The seats for the 1.1 inchers require several complex bends that took a while to get the correct shape. Some of the small parts are hard to hold and glue at the same time.