I get all my stuff from Smoktek. They are great when you call them about an issue and fast fast shipping. I ordered some stuff Thursday afternoon and it was shipped 10 minutes later I received it Saturday from Florida to Washington State. I ordered an Aspire Nautilus this morning already on its way. Oh and I figured out the bottom coil cartos. You cant let your tank get below 1/3 or you will fry them. Haven't had any problems since. They are cheaply constructed but the work well.