Hoosier, as a general rule for you. with a new flavor what is your minimum starting percentage you use before you start tweaking or adding any? or steeping
Great question! I'm afraid I have a crappy answer though...
I don't have a general rule. I smell the flavoring indirectly first and then directly second. Indirectly may be an incorrect term, but it involves holding the open bottle of flavoring about 2 feet from my face and drawing my hand, palm face me, over the top of the bottle and towards my throat. It probably looks like I've come down with the "vapors" or something, but I'm trying to smell the volatile notes and it usually requires a few passes to smell them. Directly smelling is what it sounds like...I stick my nose over the opening and sniff. (This is avoided if doing the indirect smelling gave me a clue that the direct smelling would be a bad idea, but sometimes the indirect smelling does not ALWAYS let me know how bad of an idea direct smelling could be.)
After doing this smelling thing I then have a number pop into my head as my starting percentage. This lightening fast calculation is a result of 15 centuries of mixing experience and the fact that I screw up nearly every single first mix with a new flavor and I don't care. When I do mix a new flavoring right the first time, I often wonder what the heck I did wrong and revise the vast mental formula for calculating the starting percentage so I don't do that thing again. I then start adjusting the percentage up or down depending on what it vapes like and how it smells as a mix.
OK, that first line and last line of the previous paragraph are true and the middle is all incorrect. In all seriousness, I am not too shabby at getting close to a good starting percentage on smell alone, but it took me a long time to get to that point. I got to that point by making mistakes and learning from them. It's not always perfect, even now, but I'm still seldom satisfied with any first attempt. If a first attempt tastes good, I set it aside to steep. If the first attempt tastes terrible, I set it aside to steep.
I'll make anywhere from 5-15 batches with the new flavor at various percentages and deposit them to the end table near my favorite recliner in a little basket my wife has graciously provided for this purpose. While watching TV, or reading a book, or talking with the wife, I will blindly reach into that basket and pull out a bottle and drip some in my atty. Sometimes this results in me making sour faces to my wife, but she still loves me. It's when I jump up and exclaim that the random bottle was great is when I look at my coded shorthand label, grab my computer, and look up what the heck is in it and then start to re-engineer the recipe. (The sour face bottles accumulate in a different basket and I'll pull those out and start comparing them at a later date to determine if I want to continue working on the recipe or if I want to scrap it and start some new experiments.)
This is a long process. I don't commit to recipes quickly or easily. It results in small glass bottles, lots of small glass bottles, baskets of small glass bottles, and long period of cleaning small glass bottles when I decide to dump the current experiments. (Also one of the reasons I'm so willing to trade my DIY juice for glass bottles with drippers at meets and such, because I can never have enough small glass bottles, or medium or even large glass bottles.) This also results in things like me saying, "This is nearly good.", and the wife saying, "What is it?", and me putting on my cheaters and squinting at the label while saying something like, "I think it's Bacon Ice Cream.", to which she usually replies, "You are the craziest man I know."
And that is my process and I don't recommend my process to anyone.