ok im new to this game but i have a ?? for you wine pro's, a friend of mines dad makes wine using nothing but grapes, he just crushes, then ferments for 8-10 days, when it stops fermenting it go's into a carboy then 1 month later siphoned into another carboy, 3 months later into bottles, he has won wine contest with this wine, my ?? i thought you needed to add yeast , and check ph, and all that stuff, he dont do none of that and his wine is great, your thoughts on this, i know he uses old vine zin,muscado, alicate, to make this, thx bill