ok. So I have been doing some additional testing as the vendor I purchased this from is not answering me. With ultra-low ohm, Nickel coils (premade from Aspire directly and advertised as 0.15) the vape is not as consistent as with my DNA 40 device. Actually, running the same settings on the VT200 results in very little vapor production. (40 watts @ 470 degrees). To get similar results on the VT200, I have to run 530 degrees and 30 watts. As the atomizer heats up (I chain vape) the vapor production gets less and less on the VT200. I got an .ecig file from someone on here, with a VT200, that included settings for 316L. Using the 316L in TC mode, I get constant vape production even when chain vaping. Those settings are 450 degrees @ 50 Watts. Even when the atty heats up the vape production is constant! I actually had to drop the temp to 420 degrees as I do not like it that warm. This is on 0.3 ohm coils directly from Aspire. So it appears my mod has an issue with the ultra-low ohm coils.. I have the Mod Resistance set to 0 for both tests as I do not have the means to test the Mod resistance. Inputting settings from other VT200's (Mod resistance at 0.0045 or 0.01) resulted in much poorer performance from the NI200 coils. Maybe one of the DNA peeps can chime in here and help out.