It's very hard to adapt something. You end up changing it too much to make a good movie out of it. I prefer to work with things that are custom made for my kind of animation.
When I watched the film yesterday, I found it hard to relax. It was great to hear the reaction of the audience on the one hand, and that was such a relief, but on the other hand I was still trying to make the film, trying to do different edits.