1%??? Wow. You must have uber-sensitive taste buds. I've never used
any flavoring where a 1% mix could make me happy. Sure, in a complex diy recipe that calls for multiple flavorings, we might use 1% of a certain flavor, or even just a drop or two of something like
Tobacco Absolute or
Acetyl Pyrazine, but, for a single-flavor juice, I can't imagine liking 1%. Your mileage obviously varies, LOL.
As for your question, what I understand you to be asking is: Which component flavorings from which specific flavoring manufacturers have worked well to produce a great diy RY4 from scratch? Out of the literally hundreds---probably thousands---of available tobacco, caramel, vanilla, and nut flavoring concentrates, who makes the best ingredients to whip up a superlative RY4?
My personal, subjective response is the same as the one I offered to Cool_Breeze three days ago (link:
post #2976)---
none.
I haven't had
any success making RY4s from scratch. And---believe me---I've tried. Lots of different flavorings, both in types and source companies, lots of different recipe mixes. Apparently I'm just lousy at cooking up RY4.
It's a little like pizza (sigh, I can't eat pizza anymore in my old age and state of decrepitude, and boy, do I miss it!). You have choices: You can make pizza from scratch, order it delivered from a pizzeria (chain or custom), buy it frozen in the grocery store, and some pizza places even sell cook-your-own delivery pizza, where they make the pizza fresh when you order, and you cook it in your own oven.
Well, that last option is sort of what the pre-mixed RY4 flavoring concentrates offer. At least the good ones. The RY4 flavoring concentrates that aren't so wonderful are more akin to grocery store frozen pizza. Anyway, for those of us (meaning
me) who seem to be terminally impaired at creating RY4s from scratch, the best of the RY4 flavoring concentrates represent a fairly happy compromise.