"There is a piece that has been redesigned that no longer works for the set. The piece is in step 179 in the instructions and holds the barrels of the side cannons. Older versions of the piece work fine, but it appears that a redesign has made this piece not function properly for the set. The barrel of the side cannon no longer fits inside the holes of the redesigned piece. The picture on the box and the pictures in the instruction show the older version, but the set came with the newer version that no longer fits. This is an uncharacteristic change that Lego has made."