I'm not much help on the pellet part but as far as the vertical reverse flow part, most guys believe that it's not necessary. If you have any specific questions about Edna and Easybake you can pm Gizmo as those were his creations.
I have my basic model done. Using 1" x 1" HSS frame built around the bottom half of the Traeger. Single panel front door and I made the racks offset from the smoker wall to allow the air to circulate around. Right now I have the stack coming out halfway up the chamber.
smoker front 1.JPG
Basic Model Front View
smoker cross section 2 with heat deflector.JPG
Here is a cross section view showing my planned heat deflector and drip tray. The main idea is fairly simple to allow the heat to rise to the left side of the smoker and up. Ideally it would cool and come down the right side and exit. I think I have seen something similiar in many other smokers and the it seems to make sense.
Thoughts? Concerns? Outbursts?
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I like it. I have a hunch the stack could be higher up and it might breathe better .... the top of the stack should be at least above the top of the cooker - or you are building in your own 'dead spot' and you'll be discoloring the side of the cooker prematurely.
Question: did you mean to draw the drip pan/BP to connect to the stack side of the FB with a grease discharge? That way the smoke would have to come up the left (drive unit) side and cross the CC to reach the stack to help the smoke flavor....? Just curious ....
And on the eighth day God created barbecue …. because he DOES love us and he wants us to be happy.
Current smokers: Egor (trailered RF) and Easybake (tabletop pellet drive)
I don't think that the smoke will have a chance to cool to exit. But it will exit because there's only so much space for the moving air. I have made a vertical with 2 different elevations of stacks. It gave me the option of how smokey I wanted.
Current Smokers: Backyard RF Offset and Hybrid RF Offset trailer rig with Cowboy cooker and fish fryer, always room for more........