I just received my mini tobeco velocity. I actually ordered full size from our friends at Eciggity, but they emailed me that they were out and asked if I wanted to switch my order to the mini. I'm glad it worked out that way. I really like it ! Super easy to build and wick. Plenty of room for large coils, lots-o-cotton too. A funny thing (wasn't funny at the time) happened. When I was trying to adj the airflow, I couldn't unscrew it to open. Actually got out the pliers and was really struggling. The mouth piece started unscrewing and all of a sudden, I could unscrew the airflow. Then it hit me.... I remembered watching a u-tube vid and the guy was explaining that you have to unscrew the mouth piece to get the airflow to work. HAHA !!! Totally enjoying this RDA !!!! I'm using it on my SX Mini. It's a very good combo. Looks like they were made for each other.