When I received my cage it was missing a 2.5mm screw. The key was included but the screw was missing. I contacted the manufacturer and they asked for some information (order number, box label, etc.). I couldn't provide a packaging label as I had already thrown it away. In response, they offered me to buy their spares kit. There was also a sticky substance in one corner that I was able to remove with detergent, so it's ok. I've bought a few hundred dollars worth of Small Rig parts and this is…