The FIRST thing I do when I get Nicotine Base from ANY Vendor is to Dilute a Small Unflavored 10ml Batch down to what I use on a Day-to-Day Basis.
Then I vape it. If it tastes OK, then I will use it for DIY.
If it doesn't, then at least I haven't Wasted a Bunch of PG & VG (and Possibly Flavoring/Sweeteners).
I never thought about in untill now, sounds like a good idea