Be sure you use to correct coils. I believe - and I could be wrong as I do not do TC any longer - but the nickle and titanium coils are for temp control only. Most prebuilt coils have a blue oring to let you know it is for temp control. To use watts/volts settings, you need normal coils - has a white or some such oring on the 510 connection part.



I am glad it was cheap.