Hi All, could i get someone to explain the ratio needed to achieve a 12mg nicotine hit using a smok v8. i want to purchase 100mg/ml unflavoured nicotine (not sure if i get this with PG or VG?), i don't want to use any flavouring at this present time. i am a smoker and i am making the change to vapour, although this process is very confusing. i will be using a 50ml bottle to make my mix, also i would like if some one could explain what the difference is between PG and VG. if i purchase my unflavoured nic in PG would i use VG for the remaining mix? or vice versa and could someone tell me what a doubler is (i am an ancient one).