Had a bit of time today and did a little bit on the smoker.
Here is the back of the firebox cut out to let the smoke in under the RF plate
And while I had the plasma cutter out figured I'd get the vent cut in and placed too.
This pipe is a 6 5/8" o.d. according to the calculator this will give me proper air flow.
Now for my son to get home and do some welding so we can get this thing finished and with some hope cook on it next weekend........