Well i wont get into the cerebral discussion about tax categorization et al, but i will share my own 2 cents.
I consider myself a Distiller at a Craft or Micro distillery. We are family owned and operated... in fact, there are only two of us, my father and myself. Why do i give myself this title, because not only do i do 95% of the production at our distillery, but i do everything in between from supply chain management to product delivery. I feel i have earned the title because i am trusted with the day to day operations of the distillery, regardless of what that might entail. My father, the master distiller, does not have to be around for our business to continue running, operationally that is.
He is the Master Distiller A) because he has the time and experience behind the still to come up with all of the new recipes and protocols our distillery follows, and because he earned the title from those that taught him.
People are getting too caught up in these titles though.. while i wear the title as a badge of honor, beause i know the effort i put into getting it, but mostly, it is an apt description of what i do... i distill.
Still operator = distiller = still operator, anything beyond that is just self-inflation.