Just an FYI the SLR and Calmini add aleafs are only good for 1.5-2" of lift...now i wonder if you can slide the Rancho add aleaf in between the two others of those dual add aleafs and make a real good spring pack? Steiny is heading to my house tonight to pick up some new parts and if i remember i will take some measurements and see if the Rancho add aleaf will work.