This is what I did when I first started mixing my own flavors. Maybe it will work for you.
1) Use 10 ml bottles (gives you a nice even number to multiply and lessens the amount of juice you waste...but I don't throw out the mistakes, they went in another jug to be diluted and shared)
2) Use the drop method...X amount of drops of this flavor, X of that, and Y of another, etc, etc. This is another easy thing, 20 drops is 1 ml and 10 ml is........200, 20ml 400, 30 ml 600, and so on.
3) Keep track of the drops you use from each vendor...the strength and flavor changes. The strawberry at West doesn't taste like Lorann
4) Once you get the ratio that suits you tastes, it is easy to mix any large quantity, but this time it won't be by the drop, it will be by the ml or l.
1) Use 10 ml bottles (gives you a nice even number to multiply and lessens the amount of juice you waste...but I don't throw out the mistakes, they went in another jug to be diluted and shared)
2) Use the drop method...X amount of drops of this flavor, X of that, and Y of another, etc, etc. This is another easy thing, 20 drops is 1 ml and 10 ml is........200, 20ml 400, 30 ml 600, and so on.
3) Keep track of the drops you use from each vendor...the strength and flavor changes. The strawberry at West doesn't taste like Lorann
4) Once you get the ratio that suits you tastes, it is easy to mix any large quantity, but this time it won't be by the drop, it will be by the ml or l.