Well I have one of the Vapor Flask mods and I didn't have good luck at first and had to send it in for repair (Evolv DNA40) and it cost a Hel!! of a lot more that $39 dollars and way more than I should have spent. But one you get TC going I think you will find it hard to go back to Non-TC.
Anyway glad you are up and vaping Roxy. I salute your ability to stick with it and find the problem.
Its really been a shame with the Evolv chips. I've sent back 4 of them, and they gave me a very hard time about it. I think I'm done with Evolv. I'm from Ohio, so I hate to say I prefer Yihi chips, but I do.
I have other tc mods, but with my unwillingness to use nickel (allergy), I haven't really gotten into tc. Ti is ok. At least its not soft. But, dry hits haven't been a problem for me. Even using full SS tanks, I can tell by the flavor when it needs filled, and never dry hit.