I shopped online and located the parts I thought I'd need at Lowe's.
Then gathered up the stuff and got to building. But you may be hard pressed to find 3" duct pipe, or gas water heater parts on the Islands.
Looks like this...
Now, I have a prerequisite with my smoker. I want my modifications reversible, be cause I have a 2 year, one time, replacement policy on it. If the electronics go south, the element burns out, or it farts, I can put the OEM parts back, and return it for a new one.
So everything I do is fully reversible.
I saw where Al had a can as his stack. I was onto that like a duck on a June Bug. A Bean can works good there.
But to get where I have a 3" metal stack, I made and adapter that bolts to the original exhaust port.
And I relocated the damper plate to the front of my 'mailbox mod' (Which is not a mailbox), for an air control.
My stack removes, and my current cover goes over my MES 30 to put it to bed.
3" heater ducting for stove pipe, a 3" cap for a water heater vent, a little bit of creativity with some heavy duty plumbers tape and pop rivets.
Duct Pipe -
https://www.lowes.com/pd/IMPERIAL-3-in-x-24-in-Galvanized-Steel-Round-Duct-Pipe/50257185
You might could get by with some
3" plastic drain pipe. It was what I was first experimenting with. But I found the snap-lock single wall and the cute Elmer Fudd stove pipe cap.
But you are going to have to make this stuff up.