OTHER DIGITAL PROBE THERMOMETER
My sense is to trust the Thermapen for food temp. What should I do about the 8° variation between the Maverick and CyberQ?
Choose one to monitor the pit and run with it. As long as the pit temp is fairly consistent, what the pit therm reads is less important than the internal temp of the meat and the Thermopen has that covered.
My concern is that you spent a lot of money and none of these are near where they should be on a boiling water test. I am at 120 feet above sea level and my cheap therms all read about 211°, as they should. And your maverick is above the boiling point of water at sea level.