HeadInClouds, really glad you put your site together. So far I have made only two of your recipes and they are incredible. Yesterday I put my third order in for more FA flavorings. I have been doing DIY for about 6 months now using TFA flavors and have had far too many mixes that got poured down the drain. One question I haven't found answered anywhere, are any of the FA liquids tank crackers?
It really depends on the type of plastic and glue used in your particular tank. No FA flavors instantly melt certain plastics (like, for example, TFA Ripe Banana does). As far as tanks go, cheap glue seems more sensitive than cheap plastic, so be careful if your tanks are low end and you're vaping mixes with a lot of: Fuji, White Peach, Cardamom, Anise, citrus flavors, Cola, Kiwi, mints - maybe Black Currant, Pineapple, Papaya, and Passion Fruit, too.
Plastic tanks have improved a lot since I began using them, but cheap Fasttech knockoffs I've had, when they failed, tended to be at glued seams. Even then, it wasn't instant and it did require more than just a little touch of those flavorings. I just use glass now - they last longer for me!