No one has made a convincing argument against using something like the alarms on a ET- 732 as a back up to notify you of a problem in your pit.
The odds of both the stoker and your Maverick failing at the same time are slim and none and slim's on his way out of town.
If you need your pork butt ready by say by noon and put it on a mid night with an automatic stoker on it so you can sleep is a beautiful thing. A well rested cook is good for the cook and good for the guests.
Mini,Jimmy(Jumbo Mini),BP UDS, Kettle, Potbelly Stove Smoker Smoke house, IQ,Guru etc..Keith