FK-35 or FK-50 for Mark VIII fan

[tim281]

I am going the Mark VIII route and wanted to know which controller would be better?
I assume the FK-35 which has 35 amperes of power is enough for the Mark VIII fan right?

 

[HISSIN50]

The FK35 used to be recommended but I'd ask Brian to see what he says these days (the FK50 wasn't around back then).