My 3 slabs on a LARGE

Did 3 full racks on the LBGE today... On top of the extender was a d-grid but I put 2 racks on a 13x17 on top of that for ez removal... Midway in ar was the other rack on another 13x17 with a sliding rack ( for spritzing ).   Lowest level in AR held a 14" drip pan pushed  toward back of egg 

below AR was a Spyder with a 13" stone topped with 3. 1/4" tees supporting another 14" pan oriented toward Front of egg slightly. 

Lotta stuff involved but I wanted to sprite hourly and leave ribs flat and not use a v rack.  Rub was Dizzy Dust/ mustard
it was  therefore a 6 hr slightly modified car wash Mike method.   First several hrs were a rock solid 225 ( thx cyber q ) hourly spritz of apple juice/apple cider vinegar 
after 4 hrs I upped to 250 spritzed.. After 5 hrs I took it to 275... I topped 1 rack with a sweet chile sauce, 1 with sweet baby rays, 1 with Parkay and brown sugar.  45 mins later a had 180-190 and the ribs bent easily.  1 happy daughter pictured and 1 wife inside awaiting ribs :-)  thx again car wash Mike , ceramic grill store - toys for boys, and cyber q.  Pics were at approx hour 4