Ed the whole concept of a traveling rest is to be used either just in front of the cutter or just after the cutter starting the cut near the live center on the stock being turned when turning extremely long shafts I almost always had mine set after the cutter as near to the cut as possible but the one's I had used bearings on the stems. the rests mounted on the cross slide while the cutter was adjusted in with the compound set at zero degree angle. after each successive cut the cross slide was adjusted out while the compound was adjusted in If I made a .200" pass then on the next pass the cross slide would be adjusted out by .200" with any micro adjustment needed made to the stems, then the compound would be adjusted in that much plus the amount of the next cut. But again I might have been working with a 6 to 15" diameter shaft or tube that was as much as 12 ft long

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