The Academy website lists the MES model number as MB20072618. Apparently they have given it a new number that does not directly correlate to one of the previously documented 40" models.
As to modding a Gen 1, get a pellet tray or pellet tube. Depending on if the interior above the heating element and the existing smoke chamber are the same as the original Gen 1 or the current generations (I suspect the latter as those parts would be in stock and not specially made), how you use the tray may vary, but a pellet tray or tube is the way to go for smoke.
Oh and one other thing about having a MES and a
WSM. I've been smoking and cooking on a
WSM since 2005. Owned a BBQ Guru since 2006 and that little gem makes a
WSM about as set and forget as fire can be. This year I bought a analog 30" MES to custom modify for snack sticks, jerky, and smoked sausage. I crank the analog element to full on and plug it into a Auber "PID in a box" controller and let the PID run the show. Runs from ambient temp up to about 275* with no problems (I insulated the MES analog with rock wool as one part of the mod).
I have been finding myself using the MES which was "supposed" to be for sticks, jerky and sausage, for other things more and more as of late. There is something to be said for a PID that can be programmed in up to 6 stages holding a temp within about a degree and the convienence of flipping a switch to start it up vs having to light charcoal, get out the BBQ Guru, etc...... Not saying I don't use the
WSM anymore, but it's so easy to toss a couple of chicken thighs, some country style ribs or whatever for just the two of us on the MES and let the PID run the show. I use a pellet tray for my smoke source.
Running 7 pounds of sticks in the MES Custom SS over apple pellets right now..... (on 4 of the 8 available racks).
If anyone goes by Academy to check these out, take a couple of snap shots of the floor model (including interior) with your cell phone and post them here. That would be a great help in identifying what this model actually is and what mods might be advisable for anyone interested in buying one.