Hmm, I was describing the same possibility – using mana for one's own purposes. And what, did I make a mistake somewhere, and are you saying that you didn't have such an opportunity?
Added 3 minutes later
If you can't find the clues yourself, at least listen to others. I liked Reg's version about TaCo, although not all the clues were taken into account. But at least he's peaceful, and you can trust him.