Everyone has an Opinion. I state my opinion very sternly when I think I am right. Well with time that opinion can change. In this case it will not. No, it is not to thick to Warp. Excess heat will bend these tubes. If you do not think so go ahead and weld one perch on in one pass. Heat the hell outa the tube and create an Axle Bearing Destroyer. After all when the wheel and axle chew up your customers quarter panel you can fix that next, again and again!