So I have 2 identical mods and atomizers. I thought I smelled something and kinda thought it was burnt cotton so I switched to my spare RDA. I finally realized what it was and took the RDA off and put it on the other mod and it works as it should. The smoke appeared to be coming from the board and the resistance stayed at .33 ohms with both RDAs. I'll have to inspect it and look for the things you mentioned.