I absolutely hate manufacturer's instructions. They mislead new hatchers, both with the temps on the still air, because most of them list 99.5 whether it's still or forced, and a lot of them will say fill the water wells "this" full for the first 17 days....it doesn't take any variables into...
I only have one thing to add. Still air incubators are recommended to be used at 101-102F (measured near the top of the eggs), despite the generally recommended temps that manufacturer's instructions list at 99.5F which is the average recommended for still air.