Yes and no.
It does work but not as well as testing each of your flavors individually. /u/Vurve said it best in a post recently
I suggest checking it out as well as the sidebar is quite useful ;)
Whenever I get a new concentrate in I mix 20-30ml of it at a suitable % depending on the brand.
This way I can vape it over time, letting it steep between test vapes, and take notes on how it's taste and characteristics change.
'Learning' my concentrates and taking notes is essential to successful mixing for me.
I've trained myself in this and it works but it's not perfect and you need to imagine a bit. I get a little med pill cup and put two mils of water in, then follow a percentage recipe. So if it's CAP Sweet Strawberry at 5% then five drops go in. Then FA Strawberry at 3% then three drops go in. I do the recipe I want then bring the cup to my lips and wet them. (keep with me). Then I stick my tongue out. Keeping my lips closed the flavor gets all over the tongue and I get to taste it as fully as you can at this level. (different parts of the tongue taste different things)
Weird but this is what I do. You get a very strong tasting juice but it gives you a fairly good idea of what you’re dealing with.
You should try this at least once if you like strong flavors. I do so this is how I do it. :)
Also this is NOT accurate. But it does help a bit :)
Different parts of the tongue do not taste different things.
I don't propose to be an expert I just thought I'd tell the OP what I knew about the specific thing he was asking. That point I made about the tongue was unfounded but at least I was not alone in thinking that. Thanks for keeping us informed as that's why we are here! :)
All I do is mix 19 drops of VG and 1 drop of flavoring together and drip it with a pipette into my RDA.
5% flavoring is a good way to find out what something tastes like; it's admittedly high for some flavors, but still gives you an inclination as to how strong each flavoring is and then you can adjust your mixing percentages accordingly.