Hello I have recently bought a sigelei 150 watt box mod black in color. How do I check if it's authentic? It has the serial number on the magnet and when I prss the fire button while inserting the battery it shows the yihi board info. It works like a sigelei but my concern is that my buttons appear more silver than most pictures and videos and there is a sigelei logo on the back of the mod towards the top I have never seen this in other authentics. The magnet door also does not fit perfectly snug against the body. Please help thank you in advance.