Steve, looks good! You're dead on about the temp difference. There is "dome temp" and then there's "grate temp". It's the same way on my Kegs. The grate will be cooler, heat rises so the temp will be higher near the vent, just like on any other wood fired grill or smoker. If you cook on the second tier grate, keep that in mind. Also, consider that thermometer as a guide rather than gospel, rely on that maverick and you'll be fine.
