(2F) stands for two flavors, and is something that it would be nice to see people adopt (use on the naming line of their recipes) to make it easier for folks that are new to DIY, who struggle to find recipes with only a set number of flavors. (EG: 3F, 4F, etc)
This is such a simple recipe, but oh so accurate combo.
I **strongly recommend** using a 1ml syringe for flavors that require *such low percentages*, as 0.07ml (and less) is a ROYAL PITA to measure out otherwise!
If 0.07ml (.25%) Mix Mint is too strong, try backing it down to 0.05.
(yes, it really is that strong, and that 0.02ml *is* a noticeable difference!)