I recently purchased a Coupor GT from Canvape (Nov 2015). The center pin has malfunctioned. I contacted Canvape on this issue and they would not help me. "Oh, 30 days warranty - not their problem" they said. I can't get the center pin to connect with the 510 connector of the atomizer. Tried to pull it up with a small screwdriver but still malfunctioning. All I am say is "buyer beware". Guess I will have to "garbage" my $80 investment. SMOkING was easier!!!