I'm pretty new to wine making. I look at many different youtube videos on wine making and I'm wondering how they come up with their proportions of fruit and sugar in each recipe. I would like to make 4 gallons of Pear Wine and every recipe I see has varying amounts of fruit. How do I know how much to choose? Also, do people just go by 1 gallon recipe and multiply the fruit / sugar by 4 to make 4 gallons?