i dont know anything about specific gravity and using it to make wine. we have a recipie that was passed down through the family and follows as:
3 qts uncrushed fruit (any fruit will do)
9 lbs sugar
3 gals. water
2 envelopes flieshmans yeast (wine yeast was substituted)
disolve sugar in 1 gal of water. cool to luke warm and put in fermenter. crush fruit and add to sugar water. add remaining water. disolve yeast in a juice glass full of luke warm water and stir into fruit and sugar water. place under air lock and ferment for 1 month. strain and bottle store in a cool dark place.
note: Fermentation best in temp between 68-72 degrees
three batches were made one with muscadine, one with scuppernong, and one an equal mix of both
we altered this recipie by adding campden tablets after about 35 days (4 tablets for approximately 4 gallons of wine)
it was then put under air lock for 1 week to settle. it is now very clear and tastes very good. i plan on giving it a couple more days and then bottling it after stoping fermentation. i am not looking to make a wine that will win the biggest competion in france but just trying to have fun with fruit, and enjoy the furits of our labor

any input that doesnt require a degree in chemistry helps greatly. i have gotten good info from you guys but it is not practical for me