I am a little confused, I read at common flavor suppliers they recommend starting with 5% flavor and adjusting from there up to 10% so based on a 10ml bottle we're talking from 0.5 up to 1ml of flavor added ( 6 to 12 drops ) however when I browse through some the DIY recipes posted I see some 2ml flavor for a 6ml ejuice and that seems way excessive to me could someone please help on what best ratio to use when experimenting with flavors. Thanks