Hey people, I'm looking for a story I read a few years ago on what I believe was fanfiction.net.

In the story Harry who was probably around 6ish applied a glamour to look 13 and went to Gringotts. He was then taken to his account manager who was in a meeting with Nicholas Flammel. After meeting the Flammels, he spent most of his time with them unless needed at Potter Manor. I remember later in the story he entered a dueling tournament and faced either his or Neville's twin, who was one of the children-who-lived. Sometime after this he fully moved in with the Flammels.