I have a 2001 GMC K3500 Dually 4x4 and want to put on some wheel simulators! Im wondering if any have ordered them online and found them to be very satisfactory! Please tell me what you have found! Where ordered, what model. Should I get the one's that bolt on with the lug nuts or the pound on gripper type! Will I be able to easily air up the duals! Did you get good service from the online company! Please share your experience ! Thanks ! Dan