I'm going to start another batch of apfel and i got a grocery bag full of grapes from my buddy's back yard. not sure what kind they are but they're tasty little buggers. not sure how much to put in a gallon jar with the cider? 1#? 2#? does anyone have a good starting point? they're frozen now so i still need to d-stem and smash. not looking for a ton of grape flavor but a noticable taste is kinda the direction i'm looking for. thanks in advance