Hey, thanks for the reply mate. It’s not actually moving if you’re not holding it so it’s not the FFB’s “fault” but I just can’t find a position where it’s not having some tiny input, no matter how many nanometres I try and move it with a precision scientific microscope 
If I’m making a profile with large dead zone then I might as well make the empty one and call it “DISABLED”. That is probably a decent option on reflection! 