I smoked a rack of St Louis cut ribs last night after seeing this post, I went for 70 minutes after a rub with Kansas City Rib Rub, never popped the top. Ribs from the fat side of the rack stayed nice and juicy, dried out as the rack slimmed down to thinner ribs. I think next time I'll go with BB's for one hour. Overall turned out pretty dammed good, ate half for dinner and the other half rack for dessert. Just dry rubbed, sauce on the table. RAY