Very interesting - was lab tested last week and had my contribution from fats and cho measured as my power output increased.
This information might help prevent the "bonk" at 11 hours and is probably very useful information for us bikepack racers.
Good starting article here:
http://cyclingtips.com.au/2013/08/high- ... r-cycling/

Also this:
http://www.joefrielsblog.com/2013/08/ag ... eight.html

I'll have a look, but, I expect the contents to be unachievable and in particular unsustainable for me.

But I'll read it, and see what transpires.