Alrighty, of all the pv I've bought (except for ego clones) everything has been vv/vw and I've always used the power settings. Now that I have an MVP I don't have the vw option. What I'm doing so far is just setting it to 3.7 volts and then slowly working my way up to a setting I like, usually 4v. Is this a safe way to do this or do I need to have a deeper understanding of what I'm doing? Most of the cartos I buy are in the 2-3ohm range and I don't buy anything less than that. I do have a Cobra and my coils usually are in the 2ohm range as well. Is there a stead-fast and true formula one can go by or is it all common sense and personal tastes? I admit, vw has spoiled me but I do love my new MVP.