After pestering my friend yet again (who is an electrical systems design engineer in the aerospace industry) and showing him the DNA200 and escribe in detail, his conclusion is that due to the small tolerances in deviation, fine measurements and the number of variables used in temperature control with the DNA200 (and temperature control vaping in general), many of the user settings such as case temperature co-efficients and mod resistance settings would be difficult for the home user to get accurate outside of laboratory conditions. Although I am no expert in electrical or thermal testing I would suggest this why users are getting different results from each other within their own tests (is everyone using the same test equipment and methodology?) especially regarding case thermal analysis and mod resistance, of course I could be wrong. Again I feel that device manufacturers should have done the research before the release of the devices themselves so that every thing would already be in place and users would not be having to hunt around for device specific settings. I know many of my vaping buddies who have also been vaping for many years, and who are also owners of various DNA200 devices, tend to agree. I'm not bashing Evolv or the DNA200 in any way shape or form, Evolv are a decent company and the DNA200 is a great board, but I feel that many of the device manufacturers have not fully done the ground work for the release of their DNA200 devices. Even after using relatively high end gear such as my friends Fluke meter and oscilloscope, I am still not fully confident in my own findings, or the manufacturers numbers regarding accuracy, even though the settings seem to be working fine at the moment. I agree with Rune, that perhaps there should be independent tests done preferably by a certified electrical test laboratory to confirm the data being released by device manufacturers as this would give us a better idea about the accuracy of device manufacturers data in general. My advice to anyone who is uncertain about the data given by Volcano or any device manufacturer at that regarding the DNA200 would be to leave the settings as per Evolv default. Make sure however that you have put your battery data correct as apparently that is one of the most important settings to have right from the get go. I think that this is a topic that will be going on for some time yet, until we can be confident that the numbers we are given by the manufacturers are correct. Apart from keeping on to device manufacturers to provide validated data, I don't see what else we can do. The choices at the moment are, use Evolv defaults, use the numbers from our own tests (even though they may not be accurate) or use the numbers provided by the device manufacturers (again these may not be accurate), you pays your money and takes your choice on this one i'm afraid to say. In some ways I can see why so many mech users still love their 'simple' mods.