@kayb
I do russets in the CSO all the time , looking for very very crispy skin
crackling crispy
I start off @ 400 steam bake , say 40 - 45 min, then carefully open the door
and then finish on dry bake , 425 f or so for 10 minutes until very crispy
I might do it all on dry bake , but steam bake get the initial baking done faster.