The Guru on a Chargriller will help stabilize the temperature but will not preclude you from firetending time. If you do not want to tend the smoker your egg is the best solution and the chargriller would be one of the worst.
(Brewmaster and Pitmaster)
BBQ Team: Lawn Guyland Smokers
Brewery: Black Dog Brewery
"Sam I Am": XL Big Green Egg
"R2 and D2": Twin 22" Weber Smokey Mountains
Custom Made Automated Souped Up Sabco