@Bearcarver last Xmas I picked up a bone in choice rib roast at Kroger @ $7.99lb. I cut the bones off (4) as you did. The other day they had the same @ $5.99lb. So I got two more roasts to get more bones to smoke all together. When I got them open to process, the ribs were already cut 2/3rds the way off against the bone with not as much meat on the bones so I could only leave meat on the last 1/3rd, making these look more like big lamb chops. After rereading your original post I found your IT temps at 198*F+ which answered my question. I'm going to try Smokinal's pork rib membrane on smoke tho finished IT of 195*F and was trying to find out Dino Rib IT without overcooking, being from a steak cut that is usually med rare. I prefer not to have FOTB ribs.
-Kurt