wow lots of help. Basically i came up with this way because its simple to me. I can even do this mix in smaller bottles till i get the flavors right. I wont be adding 15ml of the 0nic it will be a little less so I have room for flavor and possibly water or alcohol. The final mix will be half 36mg niquid and half 0mg liquid, flavor, and alcohol or water. This way I will never be stuck with an expensive bottle of liquid i don't like and i don't have to mix all the other stuff just add flavor, alcohol etc done.
OK, I think we know where you are going and I believe that we (curiousjan and I) are on the same page but you do say it in a confusing matter.
We start from a base liquid, something you have yet to create but intend to. The delta to mine anyways, is that the only addition that will be done is flavouring. Here is my base (alcohol only included for demo PG would be 30% or 9mls):
15mls @ 50mg nic juice (PG Based) 50%
7.5mls PG 25%
6mls VG 20%
1.5mls alcohol 5% (this I would almost prefer to add it later, as needed).
Result 30mls@25mg base of 75/20/5 (I like an 80/20% VG)
From there I use this in 3ml bottles and add flavouring. If I screw up, I'm out three mls but I still have the base.