If the PG percent is a big concern, figure the mL of flavoring into the base ratio. That is determine the amount of nic, VG and PG / flavoring combined as your unflavored formula.
Yep! I've thought of that, too, before. Would be workable, if I only made single flavoring eliquids, or just a few recipes that all took the same total % of flavorings, or within maybe a 1-2% range. They don't though, since I regularly make about 13-14 different recipes. They vary between 9-30%
total flavoring in them. (See below for why.)
I've always thought if I was using that high % of flavoring, the flavoring was too weak to be useful...looked for a stronger version.
I'm not using a high % of a single flavoring though. All the recipes I make take between 3-7 different flavorings, at varying % each.
When I first started DIY, I found the posts of Bill's Magic Vapor on the TFA thread. That led to reading his blogs full of hints, tips, recipes, etc., and asking him some questions. He uses the high total flavoring % method when making eliquids. Since he's very knowledgeable and highly experienced (even used to make eliquids commercially for years), I decided to try his recipes. I
absolutely love them! I also love that about 98% of them are shake & vape, too. Only 2% exceptions
for me, are ones that have ethyl alcohol I have to evaporate off before vaping.
Friends have me make his recipes for them, too...even 1 neighbor who can get all the free juice he wants from the vape shop he works at. He says my eliquids (Bill's recipes) beat the heck out of
any his shop sells!
I know many on the ECF make recipes at a much lower total flavoring %. Some of them even flat out say the HTF% is crazy and wrong! That's only
their opinion though. On the other hand...I've yet to read a post from someone like me who uses HTF%...suggest to one of
those people that LTF% is crazy or wrong.
That's 1 of
the best things about DIY though IMO - everyone can find what works
for them personally. That applies to the measuring method, the flavoring companies they prefer, low-high flavoring %, the recipes made, to steep or not, etc. None of those are set-in-stone, across the board, for everyone...with DIY.
By the way - The above wasn't meant to be a rant "at you", by any means. I guess I've just run across so much negativity regarding using higher flavoring %, that I felt the need to explain why some of us do it. Not that you were 1 of those people criticizing it though.
Fortunately, I only have one box for spare parts. Now where did I put that box. 
