22-Feb-06 We would machine the top of one axle box, then loosen the C clamp and rotate the box around the aluminum plug, use the parallels to square things up again, then cut the other side. We had to pay close attention to the dimensions from the 'As Built' frames, which were not the same as the blue prints (no fault of the prints). The prints also called for a 12" radius cut on the ears, to allow the box to rock up and down when in use (due to uneven track). Lacking a rotary table that size, we chose to machine a two degree taper into it. Using a black marker helps show the machined/not machined surfaces.