In a perfect world, they would include an "option" to include an Auber with permanent probe in a prefabricated and weather proof box as part of the smoker unit.
This would be hard to beat. I would be trying to find someone to sell my #3 to so I could buy one.
Why reinvent the wheel by coming up with your own panel. Just engineer Auber units directly into the SI units.
There may be some legal reasons for not doing this that I don't know about. But this type of thing happens all the time. Consider a camper that has a fridge made by Dometic, furnace by Suburban, etc. all built into their units.
Just me thinking with my keyboard.