First I'd like to say that i love my SkyStar, and Revvo tank. I got to let Aspire and SkyStar users aware of a minor issue I found when using the SkyStar and changing from one tank to another of which a different coil is installed. So I had an Atlantis Evo tank with 0.3 ohm coil installed on Skystar. With the screen off (screen off after clock), I removed the Evo tank and installed the Revvo tank, then next time I use the Skystar it says that the 0.3 ohm coil is still installed when actually the Revvo is installed, I even press the fire button and it don't change the resistance setting. I am able to reproduce this problem over and over. Not to worry though, all I do is to remove the Revvo tank and reinstall it with the screen turned on and it reads the Revvo tank ohms, or change tanks when the SkyStar screen in on. Maybe with the next firmware update this can be addressed.