18 All this work culminates in one crucial moment: reading the pattern. It involves painting five or six teeth on the ring and then running them back and forth across the pinion under tension. The pinion contact wipes away some of the paint so that you can "see" the tooth contact. Fortunately Randy's booklet offers several dozen illustrations of acceptable and unacceptable patterns for the unenlightened with recommendations on what to adjust if the patterns don't look good. In our case, the pattern indicated that the pinion was too far away, so everything had to come back apart.