Hey Swamper, thanks for reading the thread. I should have written in there that anyone can email me any questions they have if they don't want to swim thru the whole thread. .. I completely understand.
To answer your questions, you can use any battery you want, it's a single 26650. The 26650 holds a 15ml bottle. The only wear item on the device is the insulator in the (adjustable ) 510. I have had two people mess their up, I don't expect you'll be able to hurt that, or any other part on the mod, but if you do I'll send you a replacement for free. That's pretty much how I run the warranty system around here. If you break it I want to know how, so we all get to laugh at you, then I'll send you a new one, no costs.
I've also had people have trouble with their mods with the buttons becoming hard to press. This is due to the contacts being dirty. You don't have to take good care of these mods, but if it does stop working it's not broken, it's just dirty. It takes about three months of not cleaning to become noticeable.