Create a recipe on ELR and gather flavorings.
In a small Glass or Plastic storage bottle measure 2.6 grams VG, (2.6 ml. VG if mixing by syringe).
(This is your base at 80% of the mix).
Add 1 drop per 1% flavoring. Example 5% Vanilla Custard (TPA) is 5 drops Vanilla Custard (TPA).
(Repeat until all flavoring are in the mix.)
Place cap on mix and shake and vape. This should give a quick idea whether the flavors blend well together.
(Or you can steep a few days for more precise results).
If you make a test batch with 15% flavor total, measure 3.2 grams base, (3.2 ml. base if mixing by syringe).
If you make a test batch with 25% flavor total, measure 2 grams base, (2 ml. base if mixing by syringe).
Thanks to @SthrnMixer for sharing this Test Method.