Decided that the shorter hotter cooks were not giving me the texture and proper rendering I liked. Don't get me wrong; made some great ribs in 3-4 hrs at 260-275* but not consistently so. Soooo today I did St. Louis ribs (Costco) at 225, the whole way; 3 hrs naked, 2 hrs foiled, and 1hr (actually 45 minutes) painted and naked. Results below. They were "perfect" texture and the fat was gone except at the remaining riblet on a couple of them. (If I had trimmed them better, that would have been gone.).
Just FYI