One of these followed me home yesterday on a whim. I figured it was $130 box of fun. I found this site while I was researching the unit.
Questions: Is this considered a generation 1 unit? What are the differences between the generations and how can you easily identify one over the other?
Will I be able to cold smoke fish like salmon with this unit?
I've seen folks in posts show that they used the 
A-Maze-N smoker inside the unit and in a external unit such as a mail box connected with a 3" line. If cold smoking can you just use the 
A-Maze-N unit inside the smoker with the heat off or if smoking with heat the same way, why the need to put it in a mailbox?
Thanks for your help!