Filament Manager - Accuracy / Software Odometer


Hi Guys,

i regonized that the Filament Manager ist not as accurate as i wished.
I´m always left with about 100-200 gram of filament when the plugin says it´s emtpy.
So, am i doing anything wrong here?
Also, i noticed the option Software Odometer . Is this mandatory to work or "just" another way to measuring the filament usage?