The crown is the best sub tank thus far. However, until I got the RBA, for me, the arctic tank was number one. First, I make my own juice. My nicotine, flavors, and my liquid are all VG based. When I got the crown using the .5 ohm coils, I was getting dry hits on anything about 40 watts. Using the .25 ohm coils, dry hits anything above 65 watts. Needless to say I was disappointed. Since my arctic tank could handle 100% VG using .2 ohm coils at 80 watts. When you buy juice online or from a vape shop their "max" VG is 80/20. When I went to a 85/15 mix of VG/PG, I had no wicking issues or dry hits. The .25 ohm coil sweet spot, for me, is at 70 watts. The .5 ohm coil sweet spot is around 55 watts. Flavor and vapor product is unreal, and the top fill on the tank is fantastic.
Now the RBA, since I had the wicking issues and dry hits with the coils, I decided to make the juices holes a bit bigger. Using a drill, I was able to increase the surface area by 75%. It took about 10 minutes for the build. I primed the coil, and filled the tank with 100% VG. On my ohm meter my build was .2 ohms. At 50 watts decent vapor and good flavor. At 60 watts great flavor and good vapor. At 70 watts awesome vapor and flavor. Then I went to 100 watts, it was hot, but great flavor and vapor production. On my build, the sweet spot is between 70-75 watts. However, when I am driving, I have to crack the window or I can not see for a few second because the vapor is so thick. The crown is the best tank so far since the sub ohm tank boom last November. Each build has lasted about 8 days.