Hey IDJoel, can I ask how you test your batches? I make a 10ML bottle, let it sit for a day, and the fill up my 3.5ML tank. If I like it, then I'll go to 30ml with notes that is. But question is, is there something smaller that I can get because a 3.5ML tank? Something that will hold maybe less than a ml, vape and make changes then?
I test mostly in the same manner. The big difference is I don't fill it up.
Depending on how "ready" I am expecting it to be; I find 0.25 to 0.50mL is more than adequate to let me know how it is progressing (just enough to cover the juice inlet holes). The only pain in the rear, is when the flavor I'm wanting to test, is significantly different than what was previously in the tank. Then the previous flavor will corrupt my tasting efforts. That means I need to first change wicks.
If the flavor is close/similar; I can just vape half a mL of unflavored (PG, VG, and with or without nic... no flavor concentrates), and that "washes" the wick well enough for
this lazy person's needs.
I know many use drippers (RDAs)... as
@dc99 said; they require little liquid, and are easy to re-wick. But, also as they said; the flavor will not be the same... and why I don't use them frequently for testing. Test vaping, in the device you expect to be using most, is still the best/most informative feedback
for me.
If you are going to be doing a lot of recipe testing, having one or more of the same tank, can make life easier. Some will dedicate specific tanks to specific flavor profiles (this one for mints; that one for tobaccos; another for bakeries, etc.). Others, simply have one earmarked as a "tester," and re-wick between tests. Just having that one extra makes life easier (for me), as I don't have to think about finishing/draining my daily-use tank, before I can vape test my latest concoction. I also have something I can vape on while I am re-wicking.
If you are using a tank that uses drop-in coils/coil-heads; you can dedicate different coil-heads to different recipes. Store them in a small zip-lock baggy, or other small airtight container, and use whenever you want to vape
that recipe. A quick rinse of the tank, drop in the appropriate coil-head, and you are off to the races.