I have a Caravella Mod and a Dark Horse rda. I had 2 coils in it and it was working perfectly. My son's friend decided it would be smart to take the coils out and make them tighter although they were plenty tight before. While doing this he unscrewed the Mod to take the battery out and somehow accidently disassembled the bottom and ended up with the firing button, screw, spring and everything flying everywhere. Anyway, he put it back together and now when you use it the mod gets hot immediately. Not just the firing button, the whole thing gets too hot to hold after you use it 3 times. The battery is really hot too. I was worried because it got so hot so I unscrewed the bottom and put in my IMR battery instead because I've been told they are safer. As soon as I screwed the bottom back on, the mod started firing so I immediately unscrewed the bottom and took if off but it still kept firing until I dumped the battery out. I am now afraid to even try to figure out what he did wrong . Does any one have any idea what's wrong with It? Any help will be greatly appreciated because I loved that mod until he got a hold of it. Thank you 