I’ve took as many filters as possible to show his condition. All the joints are nicely tight. Don’t know if the batteries work but it’s not corroded as you can see in the photo…  I unscrewed it to have a look and then I screwed it back on the plastic bit .  the missiles do fire the little button underneath releases the head fine. the only thing I can find is swinder car  does not drop off when you press down on the cockpit. He sticks on fine and he pulls off fine but he doesn’t drop off when pressing down on the cockpit even though the cockpit does go down…