Bought 2 rba heads 1 for the smok procolor and 1 for the mag kit. There was fire and smoke when the press fit positive post came loose mid vape. Thankfully I was outside and my son's instruction on proper technique for the hand grenade toss came into play! The mag kit shorted as well but the mod survived maybe, it takes several tries to get it going after a battery change now. The kicker is smok is blaming me for user error! I won't be buying more smok hardware. So the thinning has begun after only 3 months.