Using Waldos U Tube Video as a guideline for a 5 gallons of Scuppernongs. Looks like it follows a kit instruction after secondary fermentation. At racking, says to add Sorbate along with the sulfite, thendegassing. I might add bentonite at some point. After a few months of bulk ageing, I want to back sweeten. Should I wait till then to add sorbate (before bottling)? Most all instructionsare addright before bottling. Didn't want any added chance of oxidation or future fermentation adding Sorbate early.