Your making life much harder than it needs to be. Pick one!! Calibrate it!! Monitor on the grate for the cook temp. The temp in that dome is useless! It's BBQ> a relaxing beer drinking hobby have fun with it. To be honest I would forgo the thermo altogether. When it feels hot and the smoke is Sweet Blue it's time to cook and its done when it s done.
I never met a Cow that I didn't like with a little Salt & Pepper! Certified PORK-A-HOLIC