This can be done regardless if the sled is going Because the fantastic tracking servo can backtrack to maintain tracking lock. At the time in the vicinity of the chosen track, the sled is moved in tiny increments ahead (and backwards if it overshoots) until finally the lens is within http://jaidenklhbw.theideasblog.com/1980317/sewing-machine-repair-boulder-can-be-fun-for-anyone