Welcome to the party, Booray! Now that you're here, go ahead and add your first name and town to your signature line, so we know who our newest member of "Club Lazy Q" is! 8)
Looks like the guys have you lined-out on the ribs! I cut my racks in half, for the #2, and use 1 shelf per rack. Thick pieces on the bottom, thin up top. Also, I might add that you get the best results by removing the membrane, cover with cheap yellow mustard and rub, wrap in plastic, and let "get happy" in the fridge overnight before smoking. The rub will penetrate the meat, and the salt in the rub will help them stay moist. Also add a water pan to the bottom of the smoker, during the cook. I use a disposable mini loaf pan, with apple juice or water, on the bottom of the smoker, tucked up tight to the smoke box. Fill it 3/4 full, put the ribs in, set to 235 with 3 oz of wood, and don't peek until 4 1/2 hours.
When you test for doneness, use a wooden toothpick. If it goes in easy, and you can pull the meat sideways (away from a bone), they're done! If not, give it another 20-30 min and test again.