Hopefully this link will take you to the right place:
It's there. In more than 1 place. I'm sure you seen it and just chose to try to find something, refutable.... And no, its not hard to see. As for the rest :tldr: No, it's not there. Instead, what's there is this sentence, highligted in green for people like you: Due to the complexity of this...
vapingunderground.com
Look for a post of mine on that page that talks about how to "burp" a tank. I bet that will help the leaking.
Also, one other thing that I don't think is included in that post - don't refill the juice in a tank and then let it sit unvaped. Hit it at least five to eight times so the vacuum inside the tank gets set. If you refill and just let it sit, it will leak.
When using a new coil, especially a factory coil, it's hard to keep the leaking from happening, because the tank needs to sit for a little while so the coil can absorb enough juice to not burn. You might try just filling the tank halfway on a new coil, so the coil will absorb most of the juice, then when it's time to refill, use the "burp" technique. At that point, once the tank is filled and back together, take five to eight hits right away to set the vacuum.
Good luck!
Oh, by the way, building coils isn't hard. It's more about being careful. Check the resistance on your coil with a regulated mod, when you put everything back together, make sure the coil isn't touching the deck, posts, or cap, and keep the cotton wet. Don't try to run coils with resistance less than 0.1 ohm. There are tons of videos on YouTube that will show you how to build and install. Do some reading on Ohm's Law if you have even an inkling that you might want to use mechanical or semi-mechanical mods. Also, RDAs are easier to build than RTAs. The best of both worlds is called squonking. You use an RDA as your atomizer, but the squonk mod has a bottle inside it that holds up to 10 ml of juice. When more juice is needed, you just press the squonk bottle and the liquid comes into the RDA from the bottom (where the RDA has a squonk pin - a hollowed out 510 pin that will allow juice to pass through it). Don't worry, though. You'll be fine.