I just opened and upgraded the firmware for the 200. I haven't even tried TC yet. I put a new Atlantis 2 on the rx 200 and played around from 20 to 35 watts on a .32 ohm coil or 2.73 v. The tank really heats up fast to the touch. I also have a Freemax Starre pro and an innokin isub. I also have a Horizon Tech Arctic and a smok VCT. I do not rebuild and do not plan to. Which of these tanks would you guys recommend or would you go for an Uwell Crown or something else? Thanks in advance for any and all advice.