So here we have all the bits of the gun battery put together, nothing stuck together yet, so things may change a bit in the final version. The top two pictures show the bunker with the roof of, exposing the workings of the turret, the key thing is to find 2 cardboard tubes that slip into each other, quite close fitting is the best. This will allow the guns to traverse left to right once the roof is glued into position securing the outer tube and leaving the inner one with the guns glued in position free to rotate.
