I'm still new, have to post this here. I just got a silver sigelei 50w and it seemed to work OK with only minor ohm fluctuations the first day. Now it's going crazy.its not fun to get one hit set for 1.5ohms and then the next set for 6.5. I wonder if its a coincidence that it was okay till I put the freaking aspire nautilus w/bvc coils on it. I hate that thing. I've noticed other people mention theirs acted up after using the Nautilus but no one has deduced that that was the cause, just said it acted up with both rda's and clearos. It could just be a coincidence heightened by my dislike for that tank lol just wondering if others are having a problem and how true is it that the black ones are less prone to it than the silver. I'm contacting the fleabay vendor, not sure if he'll exchange it for black or if I should even try to do so