I'm trying to bend some 1.25" OD .049" wall chromoly tubing for a buggy chassis. I have a JD3 bender. Once I go past about 15 degrees it kinks the tube on the inside of the bend. I have the correct dies. Lubricated the tube. What am I missing? Is the tubing just too thin? Any help is appreciated. And if you are asking why that size tube, its for a mini baja car competition that is sponsored by SAE.