Hey I just made my first order of supplies so I can start making my own personal vape juice. I was looking over my order and noticed I forgot Nicotine. Well when I went to buy it, I saw how it comes in different milligrams. So, I'm making juice for a mod, and I'm going to want the juice to be about 6mg... does it matter if I buy 100mg of nicotine, or 60, 24, etc and so on. There are so many options. My guess is that I'll have to do some math and know how much nicotine to add to the batches to make sure the juice is 6mg of nicotine no matter what strength I buy. Is that right? Can someone PLEASE explain it to me? Thanks!