Hi Guys, Thankyou all for your input, As i said in my last post this difference has been noticed on dna 40 and 200 All using a number of nickel uwell coils,I have swapped and swapped across the 2 x SX based mods and DNA40/200 mods and it works out to be a solid 0.01 and approaching 0.02, I have very clean 510s using 99% isopropyl alchohol and done my box thermals which came to the same values that i have seen from wismec on a post on this forum, This difference in resistance has me running my dna,s at about 470f and my SX,s at about 410f all things being equal. I am not one of the Johns of this world or like a lot of you guys on this forum who are very clever around electronic facts and possibilities ( No disrespect intended ) I am just a user who flying by the seat of my pants knows that there is something different between the DNA,s and the other two very different/similar mods that i have mentioned, I really like what john has done with this product and the interaction we can have with it but i wont be alone in noticing this difference, it might be that the dna is the product that is giving me the true vape experience but all i know is and the bottom line is SX mods for me and my set up and vape style = 410f and DNA mods = 470f. For me as a relatively uneducated person in terms of electronics i just need to know why the difference is there because I KNOW IT IS, so i can move forward knowing that the resistance values i see with SX350/ipv d2 is just plain wrong or that the DNA values are different because of ?? 60f is quite a difference when all of us are just trying to get Vaporisation at a safe and consistent temperature (clouds and flavour are secondary) And really is the WHOLE point of the DNA 200. Thanks in advance