What is the diameter of your "small hole"? I see one of these in my near future.
Did the mailbox mod.
An $8 aluminum mailbox from Amazon, 2 adjustable elbows, some silver tape and 4 ' of flex duct.
Drilled a small hole in front of box for airflow and mounted box on brackets attached to my 'smoker stand' (old dorm fridge)
Not on an aluminum mailbox, which is what I have.
Oh, I forgot. I've seen where some of the guys are using refrigerator magnets to adjust the air flow on the hole(s) on the box door. You might consider that.
Good point.The flex hose helps to cool the smoke if needed.....