percentages

So i use FA orange and TFA orange cream and i cant find a good percentage with either of those flavors. is there any good percentages for either of these? also, are there any other good orange concentrates without diacetyl out there?

Howdy all! I am making my own e liquids.. have been for a few weeks now... In a 70vg 30pg 3ml Nic mix (using Flavors Apprentice) concentrates ..i am curious as to why people recommend 10%-15% flavour? I don't know if its just me but at that ratio i find it a tad 'piss weak' and only when it...