Interesting...I did almost the same thing today, babyback ribs in my new 32" KK. I wish I'd taken pictures....First of all, my routine in my old RJ Komodo was 2 hours at 225-250, spritz and wrap in foil for 1 hour, take out of foil and finish for 1 hour. Today, on the advice of one of the other KK Members, I omitted the foil part.
I also started half of the ribs on the lower level and half on the main. In the future I will use the main and upper grill. The lower level works in a pinch, but the section that was directly over the heat source (even above the heat deflectors) was still cooking too hot, too fast.
I have to get this dialed in....one or two racks were underdone at 4 hours, the 2 that started directly above the heat were getting overdone. The rest seemed to do relatively well- I am waiting for feedback from the neighbors who are my testers. The smoke taste was good, not overdone. I used a combination of pecan and apple.
For a first cook, I could say this was close. I think it can be SO much better with some fine-tuning. At least this batch of sauce was a 14 on a scale of 10 (I will share the recipe with anyone who wishes).
Next time, pictures and finer tuning.