REPORT:
I knew I could rely on good input here. Thanks everyone for your generous comments. They were really helpful.
I've always done the loin back ribs before but I needed to expand my horizons and try spares at least once. I just did my first cook of KC spares and I have to say that they were moister, meatier, and more flavorful than any loin backs that I've ever cooked. I didn't foil them during the cook.
As several of you noted, they were delicious right off the cooker and even better after "resting" for 30 minutes in foil. And even better yet the next day - still moist.
I wanted to reheat them on my grill over low heat today but remnants of hurricane...I've lost track of the latest onslaught this season
...yes, Jeanne, gave us such a downpour that I wasn't going to try swimming them to my grill. Thank goodness the crik is well below the house. I could go kayaking out there right now.
Anyway...I sprayed them with apple juice and heated them for 2 minutes per side on the top rack of a 450*F broiler...just right. For broilers that have only one "on" setting, you'd have to lower the rack.
Thanks to all for my "10" cook,
Rita