Thanks everyone for this thread and for posting up your guide to replacing the fans Yachacha; it convinced me to go ahead with mine; I came across 2 stripped screws in my camera's body keeping me from getting at either top or side fans last time I opened it up.
Purchased a set of precision...
Update: The F35 balances on the Crane 3S, sorta; The pan arm has to be weighted. The motors will complain a little in certain positions (some tilting), but holding it up, underslung and upside-down seem sorta okay.
I've got an IF box on top and a helios 44-2 on it, alongside 2x100g weights taped...
So ever since I received my F35, I've had the 'Max Fan' issue. Previously tried to open it up, but one of the screws in a fan mount seems to be worn down, so I was unable to continue to pull out the fans.
Other than that, I have 2 of my assigns set to auto-fan. They momentarily spin the fans...