I am attempting to draft an electric car in 3D. It is constructed from 1" tubing. The tubes bend in several places, the bends are both horizontal and vertical planes. I am unable to draft this. I have attempted to extrude circles to create tubes of appropriate length, and rotating them to the right angle, but I cannot join them to form a continuous tube, also, the angle is at one point, wheras, on the car the bends are gradual, as would be formed by filleting a straight angle. How could I accomplish this properly ?