Figure 4. VATT Secondary Mirror Support Upgrades. Shown are the motors (blue end caps) and electronic position readout units (one is seen on the left outside of secondary mirror cage) that provide convenient manual coarse positioning and alignment of the secondary mirror. A tiny portion of the critical new secondary mirror support hub is seen in the center of the cage that now accurately supports the secondary mirror without causing any optical disfiguration.

Photo credit: Ned Franz