A little closer view of the same part of the mount, but showing the RA and DEC motors more clearly. These motors, their transfer and worm gears are very precise. Worm accuracies are second to none and are guaranteed to be 7 arc seconds (+/- 3.5 arc sec.) or less peak-to-peak for the Mach1GTO before introducing any periodic error correction! Precision fine pitch transfer gears insure that the tracking error caused by improper meshing of these gears in lesser mounts does not happen here.