My question is this. I am considering getting the RE 3.5 lift kit. Actually the DPG hybrid 4" which is based on this kit. So why doesn't this kit come with upper control arms? Wouldn't the stock arms be too short and cause caster issues? Would it be adviseable to upgrade and get some upper arms as well. I guess the adjustable ones would be the best bet. Those with the 3.5" kit, have you had any problems with alignment/ caster?