OMG I am in love!! So worth the money. Put a juggernaut coil in there (0.35 ohm) wicked with rayon and it is so awesome off the charts flavor all of my other RDAs are officially retired. I first put the Teflon drip (that's the white one in the pics) I was using with my derringer clone, but when installed it sat a little too close to the coil for my liking so I put the stock drip tip back in (SUPER snug fit I actually had to take out one of the o-rings). I had very high expectations for this guy and they have all been met if not exceeded. Super easy coil instillation, flawless machining, absolute genius design and build in every way. My serial number is number 4, pretty awesome!! I have never been this excited for any vaping device or accessory (not even close!) I think my girlfriend kinda hates me right now, she thinks I'm nuts, I'm seriously dancing around the house with excitement. Comment away!!