I think we 850 owners need to start pressuring Pit Boss to the point they concede that their controllers need to be updated like the ones on the 1150. Maybe with enough calls about that temperature GAP, the missing NEEDED temperature settings they might get something going. I like to cook at 250* a lot and when set to 250* it really is only at 220* - 230*, so I play the same game you do to try to keep 250* , turn up to 300* (gets too hot) then turn down to 250* (really 230*) just to maintain 250* App Assist told me that they probably will eventually but it won't be for a while. So maybe WE need to push them a little harder.
If we had 10 degree increments, that would solve the problems like we are having.