Hi Rainman,
If you're looking for a pellet burner to do cold smoking of small batches, this is one case where you'd be better off looking into something like a Traeger 070 or 075, due to their lack of insulation. On Thanksgiving morning, my 075 was doing 60-70 degrees on the smoke setting--of course it was 5 degrees and we had 25mph winds (northern types have a distinct climate advantage when it comes to cold smoking). They also have a cold smoking attachment for the 070 and 075, but since I don't have it, I can't tell you how well it works. Maybe i'll get it for giggles and find out.
The BBQ Guru folks also make an attachment that fits smaller Cookshack electrics that MIGHT be able to make them work more effectively as cold smokers. Just a thought there.
However, if you have your heart set on an FEC and want to use it for a lot cold smoking, I'd ask Eddy if you could mount a portable cold smoking box to the FEC exhaust with flex venting or something of that nature. You probably can get away with it without mucking up how your pellets burn as long as you don't reduce the size of your vent opening or have too long of a run of venting. Heck, you probably could even regulate your cold smoke box temperature that way by stretching out your venting on warmer days and shortening it up on colder days.
Now with all that said, I can't wait to get a test drive of the FEC at the Dec 2 class. The darn thing is that the more you get into smoking, it is just like anything else.....you find that you need multiple units, because each tool has different strong points. For example: No matter how many smokers I own, I wouldn't trade my Cookshack 55 for anything, because a 25lb batch of 20 inch sticks of summer sausage hang and smoke perfectly in it, retaining plenty of moisture with very little shrinkage.
Paul