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I've had good luck using drill rod and wrapping one end with enough masking tape to fit tightly in the perch and spindle holes. I space out two rings of tape so that one locates in the top of the hole and the other in the bottom: almost 2 inches apart. This way they center in the holes very well. The second picture shows white paper that I put up to provide a good view of rod alignment. This axle was way out.