I have ordered a large amount of 50/50 VG/PG blend with nicotine already in it. I want to cut it down to 15ml bottles and just make a bunch of flavors. (not necessarily mixing flavors to make "special blends"). I'm trying to figure out how much flavor to add to each 15ml? Is there a certain amount? I've seen all the calculators on here but really don't understand them since I already have the VG/PG/Nicotine blend I want. Any and all help will be greatly appreciated!!!! Thanks in advance!!