I buy zero nicotine 100% VG or Max VG from Heathers Heavenly Vapes periodically. Her flavors are on point (very good..very very good)
Purity : Heather’s Heavenly Vapes, Premium E-Liquids Hand-Crafted in the USA
But if your wanting high nicotine ejuice, she doesn't use nicotine salts and the high levels of nicotine can irritate your throat... you can get used to it, but you will have a sore throat and/or cough until you get used to the nicotine..
That said, you didn't use flavor shots. You used concentrates which are intended to be mixed with other flavorings and additives in recipes..
An ejuice recipe looks like this:
EnticeMint by
@AngeNZ
2% CAP Menthol
5% CAP Vanilla Bean Ice Cream
5% CAP Vanilla Whipped Cream
0.5% CAP Super Sweet
Cap is short for the brand Cappella flavorings.
Your favourite recipe
However, if you want flavor shots, which is pre-made recipes in a bottle, those are able to simply be added in the correct quantity..
FlavorTudes Flavor Shots - Pick Your Own Flavors
^^ the work of mixing flavors together to create an ejuice flavoring has already been done, and you just add it to your unflavored ejuice base in the quantity recommended for the size your making.
so, the reason your ejuice tasted bad, is that you didn't use a recipe to make a proper flavoring out of the concentrate you purchased