Was wondering how you are finding your flavors? Any preference for either the TFA or FA? One thing I notice with the TFA flavors is if you don't get the concentrations right they can give off a floral or perfume like taste. I've only tried a couple of FA flavors and wasn't that impressed. I've actually just received some Vaping Zone super concentrated flavors, so I'm venturing into some new taste testing.
Their Cacao is nice at 2-3%. It might be able to go higher without ill effect. (I've read great things about TFA's Double Chocolate Clear so once that comes in (probably awhile from now), I'll be able to compare.) Their cookie, however, needs to stay at 2-3%. Higher than that, it starts to taste a bit like a ...stale fortune cookie w/o the vanilla. Their marshmallow...well, I use it to smooth out flavors and it does do that fairly well. Don't really know how "marshmallowy" it tastes though since its only been a secondary. I can't say one's better than the other since I can't fairly compare the concentrates I have, but all-in-all, the next flavoring order'll most likely than not be TFA (and thanks again for the DX-line heads up for non-bulk flavors). FA was ok (their cookie was meh, but I plan on using it in a key lime pie recipe later once I go for another flavoring shipment), but I was particularly impressed with TFA's Creme de Menthe.
With the actual flavors I have (5 from AmeL, one coffee extract of mine, and koolada/EM), I've made a few successful mixes, an Andes Mint from the TFA thread and a Cookie and Coffee blend of my own making. I started the test blends at 10 mL and increase the volume to dilute/concentrate as needed to get a decent flavor. I believe I keep the total flavor percentage around 12-18%.
Let us know how the Vaping Zone flavors are. I'm kinda getting into this DIY liq thing.