Can you add after its steeped for 2 weeks?

I sorta do this with some of my more "bland" recipes, but I've found other things, I've got to just throw out shit when it isn't working - like if I added waaaaay too much cinnamon. That's not something I'll ever be able to correct, ya know?

I also start out with 10 ML batches, so I don't feel as guilty about throwing it away - but I still get that whole "Welp, that just wasted 1.87" thing.

I use a similar, but different technique.

For every single flavor concentrate I use, I mix up about ml of it in varying percentages. I keep notes for about 2 weeks as to how the flavor progresses with age.

Once I have that data in my flavor book, I have a sense of how it's going to work with other flavors to progress, and how potent it starts and finishes.

When I build the recipe, I already know what's going to happen, it's literally just a matter of exact % amounts to get the nuances that I seek.

So I mix up generally 3-4 small mixes with minor percentage differences, to see what works best. After about 2-3 weeks of testing, I have a sense at this point if one of the mixes is superior, or if I need to recalibrate from there, or if there are very minor tweaks (adding smooth if the flavor is too harsh, adding sweetener if I have to though I try to avoid it.

I find that some flavors significantly change just in a week or so, while others either start potent and finish weak, or vice-versa.

Once I've gotten what I believe to be the correct blend of flavors I am looking for, I mix a few larger batches and follow the same testing procedure, as well as blindly giving them to friends to test.

When I say blindly, I simply number the bottles and track their feedback without telling them age, steeping, or what flavor to expect. This part is crucial to the process, because without any frame of reference they will tell me if they are getting something I missed, and how to describe the flavor for sale.

My only issue with this is how much I vape...

When I mix a 30ml tester for a new flavor, it's gone in a day after it has steeped. I prefer to taste test over the course of an entire day as your palette adjusts throughout the day, vapers tongue may become prevalent with certain flavors, and certain flavor profiles grow on me after I'be vaped them for a bit.

For example, I have a Pomegranate/Banana Cream juice that just seems weird to most folks when you first pick it up. After two-three hours of vaping though, you can't put it down. For this reason, I make many variations of a single recipe and vape them in their entirety while taking notes and making adjustments to the next version.

Start with 30+ ml and add flavoring gradually from a low starting point or make 10 to 15ml groups of of the same mix with adjusted brands at slightly low flavor concentrations and add to taste. Let every mix set for 7 days (12 for creams and custards). Add nicotine only to finished or near finished recipes.

I've been mixing for about 10 months and always added nic as the last ingredient prior to steeping. I just assumed nic was a required part of the chemical process when the flavors began to come together. Have I been inadvertently sabotaging my juices? They have always turned out good this way....or so I thought. Is there additional time needed after adding the nic later? Regardless, I'll try adding my nic AFTER the aging process. Hopefully I'll be pleasantly surprised!