Just bought an overpriced Duet kit at a kiosk in the mall and in my new member post it was suggested it was a rn4081. Does anyone here know if it still is? The other poster suggested finding a 7-11 with npro cartomizers to test it but i haven't done that yet. I think this one works pretty well but then again i just bought it Saturday (4 days ago). I'm looking at buying another one since my wife thinks she wants an e-cig but i'm definitely not going through the mall kiosk again so any suggestions would be greatly appreciated.