Remove the membrane from the back of the ribs. Square the rack and trim excess fat and loose edges. Apply a light coat of yellow mustard, then season generously with the competition rub. Let the ribs sweat for 20-30 minutes.
Set the charcoal grill for indirect cooking and target 265-275°F. Add oak and cherry wood chunks. You want clean blue smoke, not thick white smoke.
Place the ribs bone-side down and smoke about 2.5-3 hours, spritzing every 45 minutes with apple juice. Cook until a deep mahogany color develops, the bark is set, and the rub no longer wipes off.
Lay out foil and add brown sugar, butter, honey, agave, and apple juice. Place the ribs meat-side down, wrap tightly, and return to the smoker for 1.5-2 hours.
Open the foil carefully. The ribs should flex easily, show bone pullback, and probe with little resistance. You are not looking for fall-off-the-bone.
Mix the BBQ sauce, honey, apple jelly, and apple cider vinegar. Brush a thin layer over the ribs and return them uncovered for 20-30 minutes, until the glaze becomes tacky and shiny.
Rest for 15 minutes, then slice carefully between each bone. Choose the most uniform bones from the center of the rack for presentation.