It's a gorgeous mod, but I ran into issues with the fire button sticking randomly.
Yeah I ran into a similar problem only with a totally different mod..... It was the first time a fire button ever acted up on me and I have been through a lot of mods through the years.....
Anyway, the mod I am speaking of is the Freemax Twister 80 watt tube mod..... It's a very high quality tube mod and I could probably run over it with a freight train and not harm it...... However, I had watched several video reviews before I purchased it and one of the reviewers mentioned that he had the fire button not function a few times.
I never paid attention much to what He said and got myself one for a knock around mod.... Sure enough, about 2 days after I got it I noticed that every once in a while when I pressed the fire button nothing would happen......... But it only did it every once in a while.... But what was worse, is that there were a couple of times when I would fire the thing and take a hit but when I released the fire button it would not stop firing! I would have to press the fire button again in order to get it to stop firing...... Having a malfunctioning fire button is not too cool of a thing to be happening to a mod, especially if it causes the mod to keep firing (dangerous).............
Anyway, and thankfully, the problem resolved itself after a couple of weeks of use and the fire button is now functioning perfectly.... I do not think there is anything wrong with the switch itself but rather the clearance around the switch is probably very tight and close.