I've done Kummoks salmon a number of times now. I just did 10 lbs worth a couple of weeks ago to give to my clients and take to Christmas parties. They worked out really well. I'm actually quite annoyed with myself. I was rushing around and ended up taking no pictures. They were a beautiful sight coming out of the brine and the oven as well.
To answer your question, although I'd imagine your salmon is done by the time you're reading this - if you remember in the instructions, it pretty much says you can let the salmon run for long periods of time during that second stage without doing too much damage. Didn't Kummok even say he left it for 8 hours once and they were still good. I have an original so sometimes have some challenges with temperature control.
I've been following the directions to the letter and things have worked out well every time. In my recent 10lbs batch, I had some fatty bits on a few of the pieces when I was done and thought to myself "Darn, I wish I had noticed that before." When the salmon was done, I wiped the fat off for show. It had no impact on the taste whatsoever. The salmon was delicious and met with rave reviews from clients, family, and friends alike.
Habs makes a good point too, but I live in the Great White North, so at this time of year, we really don't have trouble with too much heat. If anything, we could use a little more.
Carter