I completed a 400K about a month ago on a diet of Gu, Clif Shots, Clif Bars, bananas, chili, potato chips and turkey sandwiches and felt great all throughout. Not quite as regimented as you seemed to get; but I think that it's worthwhile to keep one's diet a mix of liquid and solid food. I know a lot of folks swear by the strengths of a liquid diet; but personally, I haven't trained my stomach up to that level yet and it seems happiest when the liquids and gels provide, at most, 2/3 of my caloric intake.
With that said, I've been experimenting with Hammer Gel and despite the fact that Hammer Orange does taste like citric ass, I seem to have had decent luck with it on my training centuries. I will still supplement it with sandwiches, bananas and Clif bars, but a diluted Hammer mix has been pretty effective for keeping my energy up over the long haul.