Even then when you get to say over 250ml. you can be of off by as much as 1-3% or more on the flavor per bottle. not that big a deal on a 2 flavor or 1 flavor batch but when you get in to real recipes that involve flavor you would need to know the specific gravity of each concentrate as well as a very accurate scale. Back, when I bought juices, No 2 bottles were the same. I have a very sensitive pallet, i am a Trained Chef and Somalia. S0, i could notice the different notes/flavors, showing themselves as they got hotter. Some companies were horrible. ! bottle tasted good while another from same batch would make me puke. I use calculators. "I Have Used Yours." But they are only as good as the measuring and mixing that is done. I mix a 30 ml bottle for 15 minutes, after i finish adding Nic and VG, Not to mention that my flavors are being mixed before hand. your calculator is one of the best. but for big batches you need to weigh using specific gravity(not measure with a flask or syringe)And then mix (Say a 250 ml recipe) for at least 2 hours or more depending on how you mix. and then steep as a giant bottle not break up immeadiately.I have a mixing calculator on my site that can help you my site is
thebrewtimevaper.com