That's fantastic!! That's when ya really know you're done!
Several of us do some version of what I do. I bought a dozen wide mouth 120 ml bottles at amazon. I break a liter of nic down measure out 120 mls into each bottle with a measuring cup. Freeze those. I first take out 1 of those bottles, let it warm a bit, dump it into a jar. Then I add enough pg and vg to my liking using the same measuring cup. This makes unflavored juice basically 500 mls of it 24mg nic. When I'm ready to make flavored juice, I use a 10 ml syring and pull up 10 mls, or 30 mls, or even 120 mls if I'm making my all day vape (adv) I use a 10 ml cuz that's the biggest one I have right now, at some point I'll get a 60 ml syringe. I don't use needles. Ok, so pull up ever how much I'm going to make of a particular flavor, and use the ejuice me up calculator to figure out how much flavor to put in usually using a 1 ml syringe, again, no needle. So my equipment is a jar, 1 cup pyrex measuring cup, 10 ml syring, and 1 ml syringe. I got a gallon of pg and vg each including shipping from essential depot, it's now around 43.00 I think for both gallons shipped. Nic is 40.00 to 50.00 a liter for 100 mg. You can spend more but that's for good nic from MFS. If you can get two liters at a time, shipping is free. That's it. I make my base at 70pg and 24 mg nic. After adding flavors, I'm somewhere around 22mg nic and somewhere between 70 and 75 pg. whatever it is it works for me. There are many single flavors that are really good. You don't need fancy recipes.