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Here Michael is building a Corvette driveshaft on a Hines Spicer driveshaft machine. Runout is measured at each end of the shaft and the middle-3 places in total. Runout in the middle is corrected by the hydraulic ram with linear scale (lifted up). Next, the driveshaft is automatically welded. Next, the dynamic balance is checked, and balance weights are welded at the correct rotation angle, as needed. The d/s then goes on to masking, paint, then serialized with a sticker of certification.