Presumably, that if i were to combine all the 9 bottles together to get 4.5mg overall?
If I wanted to achieve 4.5mg then I’d need to add 40ml of 18mg Nic shots to each of the zero nicotine 120ml leaving the 6mg Nic already in bottles aside then see how that vapes?
Are you saying you want to try a sample at 4.6mg? If so just mix a small sample of 7ml 6mg pre made, and 2ml 0mg pre made.