I'm glad I decided to track the story even though it was "finished". :) I enjoyed the addition. I like it when you're bored!
PS: I'm also glad you're not making it easy for Harry and Dudley. I think it's true to the characters to have them still uncomfortable with each other.
I've read the Potter series (well, skimmed over the last one) and I'm not really a fan of it, but I very much enjoyed this story. I would definitely enjoy reading more stories about Harry and Dudley developing a friendship if you decide to write them.
I enjoyed that very much. It was a nice departure from 6 years of neglect. Thanks for sharing. And, if your muse gets carried away, and wants you to write a continuation, I would gladly read that, too.