I know there are a lot on here who use raisins in the wine, I am not one who does and neither will I criticize anyone for using them, that is their preference. I just feel that if you are using raisins from a store you are adding thompson seedless grapes to your wine. Again, just how I think. Have you thought about using finishing tannins? I would think it would give you a better give you a better finishing than the raisins.