Had the new K Box Mini in black now for a few weeks and it worked great for the first few days. But now when i use the black mini sub tank on it the ohms read 9.9 like it is not making contact. Same thing happens if i use my original sub tank mini but i can get it to work, the only tank that works on the k box is my sub tank plus. Not too happy about this issue. I think its a problem with the contact pin in the box, kanger should have made it spring loaded like the Sigelei boxes. Just though i would share this issue.