I made a Cabernet Sauvignon from wine expert eclipse series. I have followed the instructions and it is now time to bottle or rack again and age. I plan on bulk aging it. At the second to last racking I added the metabisulfte, sorbate, oak cubes and chitosan clarifier that all came with the kit. After ten days I racked again and topped it up with a store bought Cabernet Sauvignon. It has been a month and I am ready to rack. Should I add campden, and if so how much? Thanks.