Some further recipe notes:
There will be extra boil-off due to the longer boil plus the KC boil, so plan accordingly. I ran off a total of 8 gallons, when normally in my system it would be 6.5 to 6.75 gallons.
The main boil, where the hopping happens, will be at a lower gravity due to the 80 or so gravity points that are in the KC boil. So you get a bit more bitterness as a result. I aimed low for my hopping, and it worked out fine.
Use a candy thermometer to monitor the KC boil. It's the only way to fly. When I was (finally!) ready to add it back in to the main boil, I used a soup ladle to add some wort in to mix with the caramelized wort, making it easier to pour it all out. But I'm sure you would have thought of that too.
"Anything worth doing, is worth doing slowly." ~~ Mae West