I'm going to start building a fistpack V2 but I had a question about switches. I would like for this mod to have some sort of on and off switch so that if the fire button on top accidentally gets pressed it won't fire . I had seen someone review a AA battery box mod on youtube that had a switch that will not fire unless you twisted the cap a bit then press down on it. I don't remember the mod or the user now. But, it seams like a good safety feature to have on a mod. Does anybody know where I can get a switch like that or something similar. I'm also open for alternatives or suggestions on this.